Newly created users are not synchronising to Azure AD / Microsoft 365.

Issue:

Newly created users are not synchronising to Azure AD / Microsoft 365.

Solutions

1. Make sure the newly created account is in one of the ‘office365’ Sub-OU (preferably ‘users’)
2. The UPN is not set correctly, in your case there is only one which matches the domain name and therefore this ‘shouldn’t’ be an issue.
3. Illegal characters and spaces in the displayname field, check and make sure this is not the case. To check this run the ‘IDFIX’ tool, this is installed on DC01 (C:\_Software\IdFix). See example below, you can correct this by applying the correct ‘action’

4. Make sure the Sync service is running, there are number of ways to do this
   • Easiest – login to office 365 portal and check the sync status in the ‘Dashboard’
   • If the sync is not started – simply open ‘services’ on DC01 and start the ‘Microsoft Azure AD Sync’ service