Azure AD Connect 1.4.x.0 Deletion Threshold Exceeded
Azure AD Connect is configured to perform automatic updates by default. When version 1.4.x.0 (in my case 1.4.18.0) is installed, device objects previously synced to Azure AD might be removed. Previous versions of Azure AD Connect synchronized devices that were not relevant. So, this release is cleaning them up. For details, see: https://docs.microsoft.com/en-us/azure/active-directory/hybrid/reference-connect-device-disappearance In larger organizations, the number of devices deleted might be more than 500 which exceeds the deletion threshold. At this point, Azure AD Connect stops syncing. You might not notice it right away, but any new user accounts will not be synced up to Azure AD/Office 365. In the Synchronization Service app, you will see a line with the status of: stopped-deletion-threshold-exceeded Before you attempt to fix the issues, you should verify that it is only device objects an not another accidental deletion issue. The steps for this from Microsoft are: Start Synchroniz...