is scanpst available in Microsoft 365?

If this question is really about New Outlook for Windows, as you have indicated when creating this post, then the answer is "No".

New Outlook for Windows has no support (yet) for pst-files and also doesn't come with scanpst.exe. This tool is only available for Classic Outlook.

Karl,

SCANPST.EXE still does not exist even though I performed, "Windows Settings --> Apps --> (--> Installed Apps if using Win 11) -> scroll down and select Microsoft 365 --> Modify --> Online Repair". Now what?

Thanks. I always use the latest version of outlook and have searched for scanpst - and its not there as you have correctly indicated.

But i would like it if my problem persists. I resolved the problem by assigning one of my pst files as a default pst file<

Just to clarify a couple of things

#1 - The sheer fact that you have stated that you have assigned a PST file as the "default PST file" (which I am assuming to mean "default data file" - indicates you are using the classic Outlook desktop program (part of Office). However, not at all clear as to how that resolved an issue that would have required using ScanPST unless what you are actually referring to is changing the delivery location of your POP accounts.

#2 - The "new Outlook" is not the latest version of the Outlook desktop program. It is the intended replacement of the Windows 10 / 11 Mail, People, Calendar apps. It is essentially "Outlook on the web" wrapped in an app framework with the added functionality of being able to add external IMAP accounts

As a FYI regarding "new Outlook"

Things to look forward to in the new Outlook for Windows https://techcommunity.microsoft.com/t5/outlook-blog/things-to-look-forward-to-in-the-new-outlook-for-windows/ba-p/3975602

#3 - If you are missing ScanPST from this system, you will need to follow the steps outlined in my original response

Thanks. I always use the latest version of outlook and have searched for scanpst - and its not there as you have correctly indicated.

But i would like it if my problem persists.

I resolved the problem by assigning one of my pst files as a default pst file

Hello Remy B

Hi, I'm Karl and will be happy to help you today.

ScanPST is installed with every version of Outlook without exception.

If it is missing from your computer, it would be because it has been deleted.

The location depends on what version of Outlook along with the bit-level. The typical locations are outlined in the following article (the same location would apply for Outlook '365 as detailed for Outlook '2016)

How to repair your Outlook personal folder file (.pst) https://learn.microsoft.com/en-us/outlook/troubleshoot/data-files/how-to-repair-personal-folder-file

If it really y doesn't exist, you will need to perform an online repair of Office (Microsoft 365)

Windows Settings --> Apps --> (--> Installed Apps if using Win 11) -> scroll down and select Microsoft 365 --> Modify --> Online Repair

If you have any questions, don't hesitate to ask, we're here to help you further if needed.