Cannot recover inactive mailbox

%3CLINGO-SUB%20id%3D%22lingo-sub-390908%22%20slang%3D%22en-US%22%3ECannot%20recover%20inactive%20mailbox%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-390908%22%20slang%3D%22en-US%22%3E%3CP%3EHi%3C%2FP%3E%3CP%3EI%20have%20some%20inactive%20mailboxes%20I%20need%20to%20recover.%3C%2FP%3E%3CP%3EI%20am%20running%20into%20proxy%20address%20conflict%20when%20running%26nbsp%3BNew-Mailbox%20-InactiveMailbox%20cmdlet.%3C%2FP%3E%3CP%3EThe%20conflict%20is%20for%20SPO%3A%20address%20and%20apparently%20my%20mailboxes%20are%20conflicting%20with%20%22Microsoft%20Exchange%20Approval%20Assistant%22.%3C%2FP%3E%3CP%3EI%20do%20not%20see%20any%20conflict%20resolution%20options%20that%20could%20be%20used%20with%20New-Mailbox.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ECmdlet%20error%20with%20following%20error%20message%3A%3CBR%20%2F%3EMicrosoft.Exchange.Configuration.ObjectModel.ProxyAddressExistsException%3A%20The%20proxy%20address%3CBR%20%2F%3E%22SPO%3ASPO_dea94f4a-33d9-45ca-98b8-3a74263bcedb%40SPO_372ee9e0-9ce0-4033-a64a-c07073a91ecd%22%20is%20already%20being%20used%20by%20the%20proxy%20addresses%20or%20LegacyExchangeDN%20of%3CBR%20%2F%3E%22SPO_Arbitration_dea94f4a-33d9-45ca-98b8-3a74263bcedb%22.%20Please%20choose%20another%20proxy%20address.%20---%26gt%3B%20System.Exception%3A%20(%20The%20%22UserMailbox%22%20with%20display%20name%20%22Microsoft%3CBR%20%2F%3EExchange%20Approval%20Assistant%22%20is%20already%20setup%20and%20using%20the%20same%20address.)%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-390908%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Online%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-391027%22%20slang%3D%22en-US%22%3ERe%3A%20Cannot%20recover%20inactive%20mailbox%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-391027%22%20slang%3D%22en-US%22%3E%3CP%3EYou%20can%20always%20provision%20a%20new%20mailbox%2C%20use%20the%20%22restore%22%20operation%20to%20copy%20the%20content%20of%20the%20inactive%20mailbox%20there%2C%20then%20populate%20the%20attributes%20manually.%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-998909%22%20slang%3D%22en-US%22%3ERe%3A%20Cannot%20recover%20inactive%20mailbox%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-998909%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F127591%22%20target%3D%22_blank%22%3E%40Grzegorz%20Wierzbicki%3C%2FA%3E%26nbsp%3BDid%20you%20managed%20to%20get%20the%20fix%20%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20am%20also%20facing%20similar%20issue%20while%20recovering%20an%20Inactive%20mailbox.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThe%20suggestion%20given%20by%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F58%22%20target%3D%22_blank%22%3E%40Vasil%20Michev%3C%2FA%3E%26nbsp%3Bsimply%20does%20not%20meet%20my%20requirement%20so%20don't%20want%20to%20restore%20the%20mailbox%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1008044%22%20slang%3D%22en-US%22%3ERe%3A%20Cannot%20recover%20inactive%20mailbox%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1008044%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F453835%22%20target%3D%22_blank%22%3E%40aanandkarki%3C%2FA%3E%26nbsp%3B%3C%2FP%3E%3CP%3ENo%2C%20I%20did%20not.%3C%2FP%3E%3CP%3EI%20moved%20to%20other%20things%20and%20didn't%20dig%20into%20this%20one%3C%2FP%3E%3C%2FLINGO-BODY%3E
Occasional Contributor

Hi

I have some inactive mailboxes I need to recover.

I am running into proxy address conflict when running New-Mailbox -InactiveMailbox cmdlet.

The conflict is for SPO: address and apparently my mailboxes are conflicting with "Microsoft Exchange Approval Assistant".

I do not see any conflict resolution options that could be used with New-Mailbox.

 

Cmdlet error with following error message:
Microsoft.Exchange.Configuration.ObjectModel.ProxyAddressExistsException: The proxy address
"SPO:SPO_dea94f4a-33d9-45ca-98b8-3a74263bcedb@SPO_372ee9e0-9ce0-4033-a64a-c07073a91ecd" is already being used by the proxy addresses or LegacyExchangeDN of
"SPO_Arbitration_dea94f4a-33d9-45ca-98b8-3a74263bcedb". Please choose another proxy address. ---> System.Exception: ( The "UserMailbox" with display name "Microsoft
Exchange Approval Assistant" is already setup and using the same address.)

4 Replies
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You can always provision a new mailbox, use the "restore" operation to copy the content of the inactive mailbox there, then populate the attributes manually. 

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@Grzegorz Wierzbicki Did you managed to get the fix ?

 

I am also facing similar issue while recovering an Inactive mailbox.

 

The suggestion given by @Vasil Michev simply does not meet my requirement so don't want to restore the mailbox 

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@aanandkarki 

No, I did not.

I moved to other things and didn't dig into this one

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Did you try reconnecting a disconnected Mailbox to a new Account?
Recreate the deleted Account and Enable-Mailbox to the "new" Account.