Office 365 Email Archives

We recently started to deploy Office 365 and aren't able to search for emails with other domain names across all mailboxes.  We have migrated older email platforms through acquisitions and need to be able to search all emails and attachments.  Are there other companies that have run into this same problem?  What approach is recommended to address the gap?

Thank you!
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David Johnson, CD, MVPOwnerCommented:
You need to explain things in a little more detail..
you have purchased companyA.domain and they have email/users

You have set your subscription as being authoritative over companyA.domain and imported the mail for these users (john/joe and jane) from whatever into O365.

you are user and you wish to search all mailboxes from ??
SU_2015Author Commented:
Here's a little more information...

We migrated from Legato to FileNet and then to Autonomy platform.  Then we moved from Autonomy to Office 365.  We are not able to search across mailboxes (SMTP addresses) not associated with the company domain.

The only solution we can find is if we put every person in house that could have communicated with someone outside and put a hold on all of their mailboxes.  This is not a feasible solution.  

Have other companies come across this same problem?  Are their other solutions?
Vasil Michev (MVP)Commented:
You can search for transport related information using Get-MessageTrace. For example:

Get-MessageTrace -RecipientAddress -SenderAddress

Open in new window

Searching for the actual message in mailbox(es) can be done via Search-Mailbox:

Search-Mailbox -SearchQuery "" -EstimateResultOnly

Open in new window

And yes, putting the mailbox on hold is required for compliance.

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