Track-It! Mail Monitor stops working or crashes if large number of emails are kept in the Inbox Folder.  Various incoming email performance issues when email is left in the Inbox after processing

This Issue is fixed in Track-It! 20.20.02 Version. If you are experiencing this issue, upgrade to the latest version of Track-It!.

Workaround:

Create a sub folder in the mailbox outside from the Inbox, move all the old, processed mails to the sub folder.  To automatically move all future messages after they have been processed, follow the below KB Article:

How to change the Default behavior of E-mail processing in Track-It! 2018?

The Track-It! Support Team recommends using the IMAP protocol to connect from Track-It! to your nominated email monitor mailbox if your using Exchange On-Prem.
IMAP provides us with the most resilient method for connecting to the mailbox. It also gives us much better opportunities for troubleshooting with more meaningful information being written to the logs if things go wrong.
For Exchange Online (Office 365 Emails) using EWS with OAuth 2.0 email type in Track-It!.

Note: That mailbox should be exclusively designated for the processing of tickets from incoming mail and should only be viewed via an email client for the investigation of faults.

More information about the various email protocols is available here.
Track-It! Email 101: Inbound email types
https://communities.bmc.com/docs/DOC-38878