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cskrud asked johnferguson answered

Issues with Azure AD Sync - Password Hash Sync failing with error 611 (Specified cast is not valid)

A new server has been spun up to have Azure AD Connect running on it. I have attempted to reprovision the server a few times to correct this error with no success. DNS is correct and can resolve the DCs. I am unable to get password synchronization working.

Is there any way to resolve this issue? Any help on this is very much appreciated.

122871-screen-shot-2021-08-12-at-122828-pm.png


azure-ad-connect
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I am seeing the same issue after upgrading from 1.6.4.0 to 1.6.11.3 this morning. I was planning to hold off on jumping up to version 2.0.8.0 but went ahead and upgraded to see if that would fix the issue and it did not.

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Thanks for your comment! We went ahead and found a version for 1.6.4 on the net and downgraded to it. Syncing is working for us again. We also ran set-adsyncautoupgrade -autoupgradestate Disabled to disable auto upgrades for the time being.

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Did you downgrade and existing 2.0.8.0 install or start a new server with the old version? Thanks!

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admtahkul-8251 answered

We have same issue with version 2.0.8.0, we have tried everything so far without any luck. Now we have case with MS and i will write back if they provide us with some solution.

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geolem answered geolem edited

We just had the same issue here.
We have started with 2.0.3, everything was working for the PHS.
Since we were not yet in full production, we do the update to 2.0.9... and the sync has been broken.

We have put the 2.0.9 in staging mode and freshly install AD connect version 2.0.3 on another server with same parameters (no import).
PHS has work back immediately. So 2.0.9 broken.... and it looks like they have changed something according to the release note.

Meanwhile 2.0.10 and 1.6.13 just get out now and looks like fixing the issue https://docs.microsoft.com/en-us/azure/active-directory/hybrid/reference-connect-version-history

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johnferguson answered

I experienced the same issue after upgrading to version 2.0.8.0. I tried upgrading to version 2.0.9.0 but the issue persisted. I opened a ticket with MS regarding this issue yesterday. They contacted me this afternoon and provided me an updated installer for version 2.0.10.0. The issue was resolved after getting this applied.

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