Want to lock down Microsoft Teams? Here are 5 essential security policies you need:

1. Location Controls: Block access from unauthorized countries and IP ranges
2. Device Security: Enforce encryption, updates, and security checks on all devices
3. Two-Step Login: Require MFA for 99.9% better account protection
4. App Access Rules: Control which apps users can install and use
5. Data Protection: Stop sensitive data leaks with DLP policies

Policy	What It Does	Why You Need It
Location	Blocks logins from risky places	Stops attacks from bad locations
Device	Checks device security	Keeps company data safe
MFA	Requires two-step login	Prevents 99.9% of account hacks
App Control	Manages Teams apps	Blocks risky third-party tools
Data Rules	Protects sensitive info	Prevents data leaks

Key Stats:

• 81% of security problems start with password issues
• 61% of people reuse passwords
• 43% share passwords with others
• MFA blocks 99.9% of account attacks

This guide shows you exactly how to set up each policy, step by step. You’ll learn what settings to use, how to test them, and how to fix common problems.

Related video from YouTube

How Conditional Access Helps Teams Security

Teams security faces new challenges with remote work. Here’s what we’re dealing with:

Security Challenge	Impact on Teams
Password reuse	61% of users copy passwords between accounts
Shared logins	43% of people give passwords to others
Unknown devices	Staff using personal computers for Teams
Global access	Logins from unexpected locations
Data exposure	Guest file sharing without controls

Think of Conditional Access as a smart security guard. It uses simple "if/then" rules:

If This Happens	Then Teams Will
Login from new country	Stop access
Personal device used	Need extra verification
After work hours	Want two-factor login
Guest tries to join	Look for sensitivity labels
Suspicious activity	Make user reset password

Teams works with SharePoint, Exchange, and other Microsoft 365 apps. That’s why you need security that works across everything.

Here’s what the system checks:

• Who you are and your job role
• If your device is secure
• Where you’re logging in from
• When you’re trying to get in
• If anything looks suspicious

The numbers tell the story: 81% of security issues start with bad passwords. That’s where Conditional Access steps in:

Protection Layer	What It Does
Identity Check	Makes sure you are who you say
Location Control	Keeps out logins from weird places
Device Security	Only lets approved devices connect
Risk Analysis	Flags strange behavior
Access Control	Sets limits based on situation

Teams uses Microsoft Entra ID to run these checks. It looks at what’s happening RIGHT NOW to decide:

• Who gets access
• What they can see
• When they can use Teams
• Which devices work
• How they prove it’s them

It’s like a bouncer at a club – nobody gets in without checking out. Say someone wants to join a Teams meeting from a new laptop. They might need to:

1. Type their password
2. Enter a code from their phone
3. Show they’re on a work computer

All this happens in the background, keeping Teams locked down without getting in your way.

Control Access by Location

Teams lets you block logins from places where your business doesn’t operate. Here’s how to set it up:

Location Type	What It Controls	Common Uses
IP Ranges	Network-level access	Block non-office networks
Countries/Regions	Geographic access	Stop logins from high-risk areas
GPS Coordinates	Mobile device access	Check authenticator app location

Here’s what you need to do:

1. Set Up Named Locations

Head to Microsoft Entra admin center > Protection > Conditional Access > Named locations. Add your:

• Office IP ranges
• Allowed countries
• Safe locations

2. Choose Your Access Rules

Rule Type	What It Does
Allow List	Lets users log in ONLY from approved spots
Block List	Stops logins from specific areas
MFA Required	Needs extra verification in new places

3. Check Everything Works

Start with "report-only" mode for 15 minutes to see:

• Which users can’t get in
• Where access works fine
• If MFA pops up when it should

Problem	Fix
Users getting blocked	Double-check IP ranges
Too many MFA prompts	Update trusted locations
Can’t log in	Look at country settings

Don’t Forget:

• Add your admin IPs (so you don’t lock yourself out)
• List all office locations
• Set up backup ways to log in
• Test before going live

Remember: These rules affect Teams, SharePoint, AND Exchange. Test each one before switching on your policies.

One more thing: Guest users follow the same rules – they can’t skip country blocks, even with shared links.

2. Set Device Security Rules

Here’s how to set up device rules that protect your Teams data:

Device Rule Type	What It Checks	Why It Matters
BitLocker	Drive encryption	Stops data theft if device is lost
Secure Boot	System startup	Prevents boot-level malware
Windows Defender	Antivirus status	Blocks active threats
TPM	Hardware security	Manages encryption keys

1. Basic Device Requirements

Requirement	Windows	Android
Min OS Version	Windows 10/11	Android 10+
Encryption	Required	Required
Firewall	Must be on	N/A
Root/Jailbreak	Not allowed	Not allowed

2. Set Up Device Checks

Open Microsoft Intune admin center and turn on:

• Encryption checks
• Antivirus monitoring
• Firewall status
• Update verification

3. Handle Non-Compliant Devices

Time Frame	Action
Day 1	Email warning
Day 3	Non-compliant flag
Day 7	Block Teams

Make It Work:

• Start with 5-10 test devices
• Use different rules for admin devices
• Send clear alerts about problems
• Run weekly status checks

Teams Rooms need these extra settings:

Check Type	Setting
Sign-in Limits	Single device
Auto-updates	On
Screen Lock	10-min timeout

Pro tip: Teams Rooms can’t use MFA – skip it.

Core Settings:

Policy	Windows PC	Mobile	Teams Rooms
OS Updates	Required	Required	Required
Encryption	Yes	Yes	Yes
Antivirus	Yes	Optional	Yes
Screen Lock	Yes	Yes	Yes
Auto-wipe	No	After 10 fails	No

3. Add Two-Step Login Requirements

MFA stops 99.9% of account attacks, according to Microsoft’s data. Here’s how to set up two-step login for Teams:

Authentication Method	Security Level	Best For
Microsoft Authenticator	High	Most users
SMS Codes	Medium	Backup option
FIDO2 Keys (YubiKey)	Very High	Admin accounts

1. Set Up Your MFA Policy

Go to Azure Portal > Protection > Conditional Access. Create a new policy that:

• Applies to all users (except emergency accounts)
• Covers all cloud apps
• Makes MFA mandatory

2. Define When Users Need MFA

Action	MFA Required?	When?
First Login	Yes	Every time
New Device	Yes	Per device
Password Reset	Yes	After changes
Known Location	Maybe	Based on IP

3. Pick Your Authentication Apps

App Choice	Setup	Works Offline?
Microsoft Authenticator	5 min	Yes
Google Authenticator	5 min	Yes
Hardware Key	10 min	Yes

Must-Do Settings:

• Stop old authentication methods
• Use app codes instead of SMS
• Check again every 90 days
• Set up backup options

Heads up: Microsoft will make MFA mandatory for all Azure logins (Teams included) in 2024. Get ready now.

"Two-factor authentication isn’t optional anymore – it’s as basic as having a password." – Kaspersky Blog

Quick Tips:

• Start with a small test group
• Keep emergency accounts handy
• Give admins hardware keys
• Don’t use MFA on Teams Rooms

4. Manage App Access Rules

Here’s how Teams app access control works. You need three things: org settings, app settings, and permission policies.

Access Level	What to Control	Where to Set It
Organization	All third-party apps	Teams admin center > Org-wide settings
Group-based	Specific apps for teams	Teams apps > Permission policies
Individual	Per-user access	Teams apps > Manage apps > Assignments

Lock Down Everything First

Start by blocking ALL apps except the ones you OK. This puts you in control.

App Type	Default Status	Approval Process
Microsoft Apps	Allow	Auto-approved
Third-party Apps	Block	Admin review needed
Custom Apps	Block	Security check required

Control Who Gets What

Each team needs specific tools. Here’s what that looks like:

Department	Allowed Apps	Blocked Apps
Sales	CRM integrations	File sharing
IT	Admin tools	Social media
HR	Scheduling apps	External messaging

Do These Things Now:

• Stop auto-updates for apps
• Don’t let people upload custom apps
• Make app requests mandatory
• Review app permissions quarterly

Keep an Eye On:

• Apps asking for too much access
• Third-party apps without security reviews
• Apps storing data elsewhere
• Apps that need updates

Hey admins: app policy changes take time (usually hours). Start small with test groups.

Want better control? Pin approved apps to the Teams sidebar. It helps people stick to safe options.

"Global admins can review and grant permission to apps on behalf of all users within the Teams Admin Center, allowing users to start the app without reviewing and accepting the permissions."

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5. Set Data Protection Rules

Here’s how to lock down your Teams data:

Protection Level	What to Monitor	Actions to Take
Basic	Credit card numbers, SSNs	Block sharing, notify sender
Standard	Financial data, customer info	Restrict external access
High	Strategic plans, IP	Block + encrypt, admin alerts

Build Your DLP Policy

Every DLP policy needs these parts:

Component	Purpose	Example
Info Types	What to find	Credit card patterns
Rules	What to do	Block + notify
Locations	Where to look	Teams chats, channels

Label Your Data

Label Type	Access Level	Team Type
Public	All employees	Org-wide teams
Internal	Company only	Private teams
Confidential	Select staff	Private + no guests

Protection Basics:

• Stop sensitive info from going to external users
• Add SharePoint/OneDrive protection to shared files
• Set up policy break alerts
• Mark new files as sensitive by default

Watch These Gaps:

• Teams chat alerts (DLP doesn’t cover these)
• Guest access in private channels
• External meeting users
• Chat file sharing

Money Matters: Data breaches cost $4.88 million on average in 2024. Strong protection rules help prevent these losses.

Change These Settings First:

Setting	What It Does	Why It Matters
Guest Access	Controls external users	Stops data leaks
File Sharing	Sets doc access	Protects content
Meeting Controls	Manages join rules	Keeps calls safe

Important: Teams DLP works ONLY when both sides use Teams Only mode with Microsoft Teams federation.

"60% of cyber-attacks come from poor human choices" – Accenture

Check your DLP logs each week. Update your rules based on what you see. This helps you spot and fix issues fast.

How to Set Up These Policies

Setting up conditional access policies in Microsoft Teams doesn’t need to be complicated. Here’s what you need to do:

First, head over to the Azure portal. Go to Security > Conditional Access.

Step	What to Do	Why It Matters
1. Access	Azure portal > Security > Conditional Access	Gets you to the right place
2. Create	Hit "New Policy" + name it	Makes the policy easy to find later
3. Assign	Pick your users/groups	Controls who the policy affects
4. Apps	Select Teams + related apps	Protects your workspace
5. Test	Turn on "Report-only" mode	Shows what would happen

The basic setup looks like this:

What to Set	What to Pick	What It Does
Users	People or Groups	Sets who’s affected
Apps	Teams + Office 365	Picks protected apps
Rules	Location, Devices	Sets access limits
Actions	Block/Allow	Controls what happens

Here’s what you MUST include:

Part	What Goes In
Name	Something clear (like "Teams-Basic-Access")
Users	Your target groups
Apps	Microsoft Teams
Rules	Allow/block settings

And these are your main controls:

Control	Setting	What Happens
MFA	On	Users need 2-step login
Device	Compliant	Only managed devices work
Location	IP-based	Only set IPs can connect

Want to change multiple policies? Use PowerShell. And don’t forget to check those Azure logs each week – they’ll show you if something’s not working right.

Pro tip: Start small. Test with a tiny group first. Use the What If tool. Keep an eye on those sign-in logs. And if something needs fixing, do it within 24 hours.

Extra Setup Options

Here’s how to handle policy combinations and special cases in Microsoft Teams:

Policy Combination	What It Does	Setup Notes
MFA + Device Compliance	Requires 2-step login and managed device	Set both to "Grant" with "Require all"
Location + App Rules	Controls app access by location	Use IP ranges in location settings
Device + Data Protection	Manages file access across devices	Link with SharePoint settings

When policies overlap, here’s what happens:

Scenario	Result	Action Needed
Grant + Grant	User needs both	Set "Require all"
Grant + Block	Access stops	Block wins
Multiple Grants	Need all conditions	Check What If tool

For specific situations:

Case	Setup	Notes
Guests	Create guest policy	Apply to guest group
Private Channels	Add channel rules	Limit to owners
Sensitive Data	Use label rules	Set in Purview

Quick Tips:

• Use What If tool before adding policies
• Create emergency access groups
• Name policies clearly (example: "Teams-Guest-MFA")
• Start with small test groups

System Limits:

Item	Max Number
Auth Contexts	99 per org
Named Locations	195 per tenant
User Policies	No cap, but all apply

"Set policies that work for your organization and stick with them." – Vasil Michev, MVP

Here’s a key point: When policies clash, block settings ALWAYS beat grant settings. It’s how Teams keeps things secure when rules overlap.

Teams-specific settings:

Part	Policy Tips
Chat	Set for all Office 365
Files	Include SharePoint
Meetings	Add meeting rules

Setup Steps:

1. Set basic access
2. Add device rules
3. Set location limits
4. Add app controls

This step-by-step method helps spot issues early while keeping security tight.

Track and Update Your Policies

Here’s what you need to know about monitoring Teams Conditional Access policies:

Monitoring Tool	What to Check	How Often
Sign-in Logs	Failed logins, policy blocks	Daily
Audit Logs	Policy changes, change authors	Weekly
CA Insights Workbook	Policy performance, success rates	Monthly
Log Analytics	Custom analysis, detailed data	Quarterly

Set Up Your Monitoring:

1. Enable Monitoring

You’ll need a Log Analytics workspace and Microsoft Entra ID P1 license.

2. Configure Access

Set up Security Reader roles in the Microsoft Entra admin center.

3. Store Your Data

Pick between a storage account or Log Analytics for your data.

4. Review Results

Check the CA insights dashboard for policy impact.

Watch These Numbers:

Metric	Purpose	Impact
Success Rate	Shows working sign-ins	Tells you if policies work
Failure Count	Shows blocked attempts	Spots problems early
User Actions	Shows MFA and device checks	Measures user friction
Not Applied	Shows missed policies	Finds security gaps

Fix These Common Problems:

Issue	Where to Look	What to Do
Too Many Failures	Sign-in logs	Change policy rules
MFA Problems	User stats	Adjust MFA settings
Device Issues	Compliance data	Update device rules
Location Blocks	Named locations	Check IP settings

"Organizations should set whatever policies make sense for your organization and stick to them." – MVP Vasil Michev

Check Your Policies:

When	What	Why
Daily	Sign-in blocks	Fix access fast
Weekly	Audit logs	Track changes
Monthly	Impact data	Check performance
Quarterly	Deep dive	Make improvements

Before changing policies, use the What If tool – it shows problems before they hit users. Keep your audit logs for 30+ days.

Here’s a key point: Block settings ALWAYS beat grant settings. Double-check both when you make changes.

Work with Other Teams Tools

Here’s how to boost Teams security by combining different tools:

Tool Type	What It Does	Security Benefit
Templates	Sets team structures	Same settings everywhere
DLP Policies	Protects data	Blocks unwanted sharing
App Controls	Handles outside apps	Cuts down risks
Policy Templates	Ready-to-use rules	Fast security setup

Make Teams Better with nBold

nBold makes Teams security simple:

Feature	What You Get
Templates	Same security for all new teams
Team Rules	Better access control
App Management	Safer third-party apps

Here’s what you need to do:

1. Pick Your Policy Templates

Microsoft’s templates help you watch:

• Who talks to whom
• What data gets shared
• Which apps teams use

2. Handle Outside Apps

Microsoft watches over 8 trillion security signals every day. Here’s how to stay safe:

Do This	Why It Matters
Stop unknown apps	Keep risks out
Look for Microsoft badges	Stick to safe apps
Watch app use	Stay within rules

3. Set Up Endpoint Manager

Check This	When
Apps	Every week
Rules	Every month
Who has access	Every 3 months

Add MFA

MFA stops 99.9% of account problems. But Teams Rooms need special rules:

Device	MFA Rule
Your own device	Must use MFA
Shared devices	Different rules
Teams Rooms	No MFA needed

"Check your Teams Apps data reports often" – Vasil Michev, MVP

Set Up Teams Rooms

For safe Teams Rooms:

Need This	Do This
License	Buy Teams Rooms Pro
Groups	Set up room accounts
Names	Use clear patterns
MFA	Skip it for rooms

Note: Teams Rooms can’t use normal MFA – there’s no way to approve a second device.

Next Steps

Here’s what you need to do to keep your Conditional Access policies running smoothly:

1. Regular Policy Reviews

Your policies need constant attention. Here’s what to check and when:

Task	When	What to Do
Back Up Policies	Every 6 months	Save as JSON/XML files
Check Sign-in Data	Monthly	Look for access blocks
Update User Groups	Every 3 months	Check who’s in/out
Check Devices	Weekly	Make sure they follow rules

2. Keep Good Records

Write down EVERYTHING about your policies:

What to Track	What to Write
Policy Names	Simple names that make sense
Changes Made	When and why you changed things
User Impact	How changes affect daily work
Test Results	What happened in test mode

3. Watch and Check

These tools help you spot problems:

Tool Name	How It Helps
Gap Analyzer	Shows what you missed
What If Tool	Tests different scenarios
Sign-in Logs	Shows who got in (or didn’t)
Report-only Mode	Tests new rules safely

Do’s and Don’ts

Do This	Not This
Bundle similar apps	Make rules per team
Name things clearly	Change without testing
Have backup access	Block all guests
Test everything	Skip writing things down

"The What If tool is like a crystal ball for access issues. Use it before every change." – Vasil Michev, MVP

Check These Things

Item	What to Do
Devices	Check Intune rules
Networks	Update IP lists
Apps	Look at outside apps
MFA	Check Teams Rooms settings

For Teams Rooms, do this:

Setup Item	Action Needed
Accounts	Put them in Entra ID groups
Device Rules	Set special conditions
Networks	List OK locations
MFA Setup	Keep them out of normal rules

Check Microsoft Teams admin center once a month – new features might need new security settings.

FAQs

What is the limitation of Conditional Access?

Here’s what Teams admins need to know about Conditional Access policy limits:

Policy Aspect	Limitation Details
Total Policy Limit	195 policies per tenant
Policy States Included	Report-only, On, Off modes count toward limit
Policy Expiration	Policies stay active after license expiry

Want to make the most of your policy limit? Here’s what works:

1. Bundle similar apps together: Put apps with matching security needs under one policy
2. Keep track of your count: Stay well below the 195 limit
3. Clean up regularly: Delete old or duplicate policies

Here’s a quick guide to policy management:

Action	What to Do
Group Apps	Put apps with similar rules in one policy
Remove Extras	Delete policies that do the same thing
Check Status	Review which policies are active

Remember: The 195-policy limit covers your whole tenant. Start with a solid plan – group your apps based on users and security needs. This way, you’ll use fewer policies while keeping everything locked down.

Related posts

• Microsoft Teams Note Security Checklist 2024
• Microsoft Teams DLP: Setup Guide 2024
• Troubleshooting Microsoft Teams Information Barrier Policies
• How to Set Up Information Barriers in Microsoft Teams