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Therefore, if the DNS server uses any other port, nslookup queries fail.

Select the button below to launch a diagnostic in the Microsoft 365 admin center.

It also provides selective Export option to move PST file selected data items only to the required file format.

To set these, see the section below Update offline settings.

You can set it to a higher number if you desire / need but it works for a user who has 14 mailboxes.

Any problems are noted in a message that has "OST Integrity Check" as its Subject.