If you are trying to change mailbox delegation settings via Exchange Admin center and show the access control defines the ObjectType {xxx-xxxx-xxx-xxxx} that can’t be resolved tab mailbox delegation, don’t panic, today, I am going to how to fix it.
1.Login to exchange server.
2.Open Internet Information Services (IIS) Manager.
3.On the IIS Manager page, expend exchange server, select Application Pools, right-click MSExchangeECPAppPool, select Recycle.
The issues should be fixed now, you also can run IISReset or reboot exchange server.
Hope you enjoy this post.
Cary Sun
Twitter: @SifuSun
Web Site: carysun.com
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