Error : Sync not permitted. Account doesn't have permission to sync with the mail server.
Article ID: CTX226360
Updated On:
Description
Error : Sync not permitted. You account doesn't have permission to sync with the mail server. 
Resolution
Follow the below instructions:
Please run this command on the Exchange Management Shell check for the affected user account has permission to sync.
Please run this command on the Exchange Management Shell check for the affected user account has permission to sync.
- Get-CASMailbox -Identity affectedusername | fl *ActiveSyncEnabled*
- Output will be --- ActiveSyncEnabled:False
- If the above return false run the below cmdlet to enable it
- Set-CASMailbox -Identity affectedusername -ActiveSyncEnabled $true
Problem Cause
Active sync was disabled
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