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tbwork150's avatar
tbwork150
Copper Contributor
Oct 29, 2021

Re: Exchange 2016 - Problem adding users to Send As or Send on Behalf

This answer is AMAZING. I don't know how you found this, but it saved me. Also in our case, once I updated the .aspx page, I ran into a permission error ("Active directory response: 00000005: SecErr: DSID-031521D0, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0").

The cause? "By default, Exchange Trusted Subsystem is not granted the "modify permissions" permission. This causes the Add-ADPermission cmdlet to fail with an Access Denied error in some circumstances." The answer was to modify the OU container holding the group(s) and allow "Exchange Trusted Subsystem" rights to modify the groups.

The steps are here:
https://support.microsoft.com/en-us/topic/access-denied-when-you-try-to-give-user-send-as-or-receive-as-permission-for-a-distribution-group-in-exchange-server-505822f4-8dca-7b97-d378-c8416553f6d2

I hope this helps someone else out!
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