Unable to set permission using ECP. Error 5 Multiple objects with Sid S-1-5-32-544 were found

Copper Contributor

Hi all,

we are using Exchange 2019 on prem and since a week we are unable to set mailbox permission using ECP in any mailbox: We can open mailbox details but when choosing mailbox delegation, a popup "try again later" is logged. also Event 5 in eventlog is raised with "Multiple objects with Sid S-1-5-32-544 were found".

Powershell is working!

I checked all mailboxes getting permission detailes but I am unable to find any problem.

Any hints?

3 Replies

Hi @Gernot_Meyer 

try below command and check again 

net stop MSExchangeIS
net start MSExchangeIS




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Hi@Deleted and thanks for answer.

Server has been rebootet. So that doesn't solve.