Backup failed with following error code ‘2155347997’

June 9, 2015

I have a System State backup failing for days on a Windows 2K8r2 server, giving an Event ID 517 error Sad smile

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Quite a cryptic error code ‘2155347997’ 

After looking around on the interweb I found a lot of hotfixes and workarounds to get it solved. But I was convinced that none of those was really the root cause.

I had a gut feeling that lack of disk space would be a more reasonable cause of the failing backup.

I decided to start a manual backup using WBAdmin

But it did end into the same error ?

Next I decided to save the backup to a different server logical disk using this command :

WBADMIN START SYSTEMSTATEBACKUP -backupTarget:\\server\e$

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And voila all went well Smile


Msoidentitycrl Tracing Growing Rapidly

June 3, 2015

At some point I was surprised to see that my C: Drive on the production server was filling up rapidly ? Sad smile

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After a quick analysis I saw that the reason was 40 Gb of msoidtrace tracing log files ?

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After checking a bit deeper I could see that these where coming from the AD Sync Services we had installed lately.

Solution :

After applying the proper registry keys

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And restarting the service “Microsoft Online Services Sign-in Assistant”

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The problems where gone Smile

Read more here.

Enjoy !