OnPremise archive mailbox not showing for Office 365 users

[MaximeViret]

Hello everyone,

We encounter an issue with hybrid configuration, here are some details : 

- Exchange 2010 SP3

- ~15 users migrated to Exchange Online

Situation : 

- User "Tom" has his mailbox on Exchange Online, with an E3 licence, arcihve mailbox enabled

- User "Bob" has his mailbox on Premise (Exchange 2010)

- User "Mike" has his mailbox on Premise (Exchange 2010), archive mailbox enabled

- User "Tom" has full access delegation on "Mike" mailbox

- User "Tom" can see and have access to "Mike" mailbox

- User "Tom" can't see "Mike" archive mailbox

- User "Tom" can see and access his own archive mailbox

- User "Bob" has full access delegation on "Mike" mailbox

- User "Bob" can see and have access to "Mike" mailbox and archive mailbox

To sum up :

- An Office 365 user with full access delegation on an On Premise mailbox (with archive mailbox enable) can't see nor have access to this archive mailbox.

Any help would be much appreciated.

Cheers,

Max

[#2]

@MaximeViret 

I have the same problem with our hybrid migration. Yo Microsoft people! Answer us. 

[#3]

Hi @MaximeViret 

Did the user check also OWA? 

Log in to your mailbox by using Outlook on the Web.
Right-click your name in the folder list, and then click Add shared folder.
In the Add shared folder dialog box, type the name of the mailbox that you have been provided access to, and then click Add.
The primary mailbox and archive mailbox appear in Outlook in the web folder list.

Hope this helps!

[#4]

@Pavel_lV 

Did the user check also OWA? I am an admin, my mailbox has been migrated to 365. I gave myself full-access rights to a On-Premise-local-archive-enabled-user.  It has been my understanding that to access an on-premise user(with archive), a cloud user must use the  "open another mailbox" menu option by clicking their initials in the top right corner of outlook.office.com. This will then direct the cloud user to an on-premise instance of OWA, something line https://domain.com/owa. 

Log in to your mailbox by using Outlook on the Web.
Right-click your name in the folder list, and then click Add shared folder. This does not work per above explanation. Cute attempt though 

In the Add shared folder dialog box, type the name of the mailbox that you have been provided access to, and then click Add. For shoots and giggles, I tried anyways. Yea....nooooo! From cloud instance of OWA outlook.office.com, I right clicked name, selected "Add Shared Folder" and added the on-premise-local-archive-enabled-user which I have full access to. Unsurprisingly, I  received the error "you might not have permission to perform this access" 

The primary mailbox and archive mailbox appear in Outlook in the web folder list. Nope, this does not work

Outside of OWA outlook.online.com, my Outlook desktop client, accessing my cloud based mailbox, does show the on-premise user which I have full access to. However I cannot see the on-premise users local on-premise archive. 

Please reread initial situation provided by @MaximeViret and provide solution for cloud users to view on-premise users archive. 

[#5]

@MaximeViret we are experiencing the same problem. Did you ever get 365-users access to on-premise-archives working?