ContributionsMost RecentMost LikesSolutionsRe: AdService.exe No longer does AD Sync since end of April Thank you Zsolt, we have added you to email chain for ticket 17251072 Re: AdService.exe No longer does AD Sync since end of April Just an update, once I created new AD groups with less users I was able to do a one time sync at least and the service no longer crashes. Guessing we ran into some undocumented maximum group user maximum that was breaking the ADSync service. Now the Logs are not updating within the Admin console and its not doing live changes (like adding new users to the ad groups, disabling accounts) so still struggling there. AdService.exe No longer does AD Sync since end of April Hello, Since the end days of April, the ADService.exe aka AD Sync is not working. Rerunning the setup and it talks to the AD, it knows how many users to sync up. But the Rescue Active Directory Synchronization Service will not stay running and continually stops, even when I tell it to start or restart the service in failure, same thing. This had been working fine for months and as far as I know the VM I am running it from had no changes applied. I tried the brand new sync tool that has the Azure piece but still using the AD Sync side; same thing happens. I have also tried running the setup on a completely different system (my own laptop) and have the same issue, the service just wont stay running and do the syncing. Also I have had a ticket in with Support for a month and nothing back. Please help meObi-Wan Ken-Go-bi. You're my only hope. WER Event Log: Fault bucket , type 0 Event Name: CLR20r3 Response: Not available Cab Id: 0 Problem signature: P1: AdService.exe P2: 2.0.138.0 P3: 9b1f39f4 P4: mscorlib P5: 4.8.4480.0 P6: 61d667c0 P7: 3936 P8: 8 P9: System.ArgumentNullException P10: Attached files: These files may be available here: C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_AdService.exe_c0cdc06394436d8457aea37e7e89096536ffff_e2dbccac_010cb9b7 Analysis symbol: Rechecking for solution: 0 Report Id: ff2e9234-e054-11ec-80f1-005056929080 Report Status: 0 Hashed bucket: