How to Fix the access control defines the ObjectType {xxx-xxxx-xxx-xxxx} that can’t be resolved tab mailbox delegation at Exchange 2016 issues.

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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