Search in outlook 2016 shared mailbox is not working

Gabe_Bratton 

We are running multiple on-prem servers and have encountered this issue many times by now, with different results everywhere.

Is there a timeline for the fix yet since it has been a while?

jlutzwright 

Hello, the software is suppossed to be in french in this case. Thank you for your solution.

joriswengerixionch 

If it’s not supposed to be in French, it’s an issue that I’ve run across. Sometimes there is some confusion when you have installed Office when the computer came with a demo version. Uninstall all versions of office (you’ll probably need a third party uninstaller such as Revo Uninstaller, since most of the installations will fail), then reboot and install again. This should fix the language confusion issue.

Hello,
I have the same problem (search did not work on shared mailbox in Outlook Microsoft 365 MSO (16.0.12827.20200)).
I tried the solution on this thread.
I also tried the solution on this page : https://support.office.com/en-us/article/troubleshooting-outlook-search-issues-2556b11f-f4d8-46be-b0a7-de33a3f4f066

But when I add the shared mailbox and it download the data in the .ost file.

Sometime it work and sometime I have an error on the shared mailbox : (in french : "impossible de développer le dossier echec de l'opération du client") 

Transalte : Impossible to develop the folder. faillure of the client's operation.

I have tried in cache mode and wihtout cache mode.

Without cache mode, the search juste keep going and do nothing.

I have tried to create the register key :

HKEY_CURRENT_USER\software\Microsoft\office\16.0\outlook\search
DWORD: DisableServerAssistedSearch
Value 1

For this one : 16.0\outlook\search

HKEY_CURRENT_USER\software\policies\Microsoft\office\16.0\outlook\search
DWORD: DisableServerAssistedSearch
Value: 1

rob_dev 

In Outlook click File, Add Account.  Put in the address of the shared mailbox.  When you get prompted for credentials look for "User other account" or similar wording.  After you click that put in your primary email address and password that has permissions to the shared mailbox.

rob_dev you need full access to the shared mailbox. you can add the full access in the exchange admin panel. after you granted the access you can add the mailbox without using a password.

Gabe_Bratton 

I am using Exchange online. No on premise at all. How can i add a shared mailbox as an other email in the profile? I am being prompted for a password and i was under the impression shared mailboxes had no associated passwords. 

Berny_St 

For the first issue where you added the mailbox as another account in the profile are you not able to set the Sync Slider for the second account (shared mailbox) to All?  Maybe its a huge mailbox and takes up too much space?

In the next scenario you have the shared mailbox added to the primary account (File, Account Settings, Account Settings, More Settings, Advanced, "Open additional mailbox".  In this scenario search will work but you have to click on the Inbox of the shared mailbox and switch the search scope to "Current Folder". 

I think the main issue most folks have mentioned is needing All Mailboxes scope to work when searching from the Primary email account.  Is that what you are needing to do?  The only good solution for that scenario is to add the mailbox as another account in the profile and set the Sync Slider to how many months you need the results from.

we also have some troubles with the search and shared folders. 

we have added a shared folder as second mailbox in the outlook profile. the mailbox has a cache duration of 3 months. the search in the shared folder works fine for the caching period. if we want to search for older mails you'll get shown the mails from the inbox folder. but no search results. 

we don't have used the provided reg key change for using only the local search.

do you have a solution to use the cache feature in the shared folder, and also to use the online search in the shared folder. 

if we add the shared mailbox to the primary account, so the shared mailbox will be in online mode, the search works well. but the performance of the shared mailbox is very slow (showing mails, moving mails, ...). if we activate the feature "download shared folders" in the primary account, the search is completely broken (you get no results from the shared mailbox). but the performance of the shared mailbox is better than in online mode.

is there a resolution, to have a cached shared mailbox and also can use the local search for the cached period, and also have the possibility to search for older mails.

thank you for your help!