Forum Discussion
serverpro
Apr 23, 2020Brass Contributor
Active sync device getting blocked automatically
Few of my user’s active sync devices are getting blocked automatically.
Created a test active sync mailbox policy and assigned the same to the affected users still no help then checked the user’s device ID’s and added the device in the allowed device list again the devices got blocked n 24 hours and started appearing in blocked devices.
Checked the details and found the below reason for the block:
Device model: | Outlook for iOS and Android |
Device type: | Outlook |
Device ID: |
|
Device OS: | OutlookBasicAuth |
Device user agent: | Outlook-iOS-Android/1.0 |
Device IMEI: | |
Exchange ActiveSync version: | 14.1 |
Device access state: | Blocked |
Device access state reason: | Individual |
My users are managed by MDM Intune hence checked for any conditional access policy but could not find any.
What could be the other reason the devices are getting blocked automatically even after adding the device ID’s in the allowed list?
- BemmelenPatrickIron ContributorDid you maybe enabled Security Defaults in your tenant?
This disables Basic Auth for Exchange Online completely:
https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/disable-basic-authentication-in-exchange-online