Remove duplicates within two accounts

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Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
Up front: it was a mistake.
However, by copying (or sometimes moving) mail from a Gmail account into Outlook I ended up with duplicates.

In vain I have been trying to figure how to solve this. Duplicate email tools, one way or the other, could not produce duplicates.

So the Outlook.pst file contains (copied) mail being identical to those in Gmail.pst

From the Outlook.pst I want to move mail to some 'duplicate folder', when following fields are identical in both Outlook.pst and Gmail.pst
from: sender-email
sent date-time stamp

Like this:

SnagIt-12032021 081241.png

Ultimately I was considering to perform an advanced search within the Outlook.pst - "sent to" : gmail-address and
move those mails to the Gmail.pst.
I will definitely end up with duplicates in the gmail.pst and I am not sure whether duplicate email tools will help me out.

Any suggestions?


SnagIt-12032021 075342.png
It looks like the file size changes when you move the message - so any duplicate remover needs to skip that - the received date, sender address, and subject should be the same.

Ultimately I was considering to perform an advanced search within the Outlook.pst - "sent to" : gmail-address and
move those mails to the Gmail.pst.
This may be the best move - a duplicate remover will be faster if it only needs to check one folder or pst.

I have a macro - but it is slow.... slower than molasses on a frigid day. if you only have a a few hundred to check and they are all in one folder, it won't be bad, but an addin will be faster.

IMHO, Relief Jet is the faster of the duplicate checkers. ReliefJet Essentials Overview - ReliefJet for Outlook
Thank you. I indeed moved the 'Gmail sent to'-mails from Outlook back to Gmail inbox. Reliefjet checked out 12000+ Gmails and could find just 17.
Basis: Sender, Title, Receiver and date. So it is fine now.
Thanks again.
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