AutoCompleted information did not migrate across..

EE,
We have recently moved to Office 365 as a means of escaping another ransomware attack (A topic for another EE-Question).
> In making the migration, we used the PST files from our various PC-Based Outlook Clients (We were using Outlook 2003/2007/2013/2016).
> As a precaution so as not to lose the user's original PST file, I made a copy of it and placed it on the C:\
> I then imported the PST file to the new Outlook 2016 PC Based Client
> Following Microsoft's Office 365 Tech Support instructions, I then Exported the same file back into Office 365(Not sure why, but I confirmed twice that is what they wanted me to)

In any event the PST file was imported and sync'ed with the OWA client and all appears to be working, EXCEPT the "AutoComplete" did not carry over from the previous Outlook account and we need to know how to recover that information.

Does anyone have any experience with this?

Rojosho
LVL 7
RojoshoRTCC-III Level-2 SupportAsked:
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JohnBusiness Consultant (Owner)Commented:
The autocomplete files are not part of the PST file. They are in the Stream Autocomplete location.

https://support.microsoft.com/en-us/help/2199226

Location here;   https://www.msoutlook.info/question/844
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Vasil Michev (MVP)Commented:
In any case, the autocomplete cache will be broken after a migration, as the entries there rely on the information from the old server. If you want to make sure autocomplete works as expected after migration, you need to ensure that the legacyExchangeDN attribute is added as X500 alias, details here: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_9650-NDRs-and-the-legacyExchangeDN.html
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RojoshoRTCC-III Level-2 SupportAuthor Commented:
Gentlemen,

THANK YOU for your information, which I will put to good use - I will keep you posted.

Hey John, nice working with you again  :)

Rojosho
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RojoshoRTCC-III Level-2 SupportAuthor Commented:
Actually, John answered my question, so I am going to close this question...

Thank you guys

Rojoshow
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JohnBusiness Consultant (Owner)Commented:
Thank you and I was happy to help
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