Knowledge Base

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How to extract MSI files from an EXE installer

Problem: You need to extract an .msi file from an .exe installer. Solution: There are at least three ways of solving this problem, but none of them is universal. You might need to go through all of them to find the one that works for the EXE installer that you have. CodeTwo strongly advises against extracting (and using) MSI files from [...] (ID:503)

How to find the Message-ID of an email and use it to track messages in Exchange and Office 365

Problem: You would like to find the Message-ID of an email and use this ID to track emails in Exchange Server and Office 365 (Exchange Online). Solution: About Message-ID How to find the Message-ID of an email How to track emails in Exchange Server via Message-ID How to track emails in Office 365 (Exchange Online) via Message-ID About [...] (ID:496)

What is UPN (User Principal Name)?

In Windows Active Directory, a User Principal Name (UPN) is the name of a system user in an email address format. A UPN (for example: [email protected]) consists of the user name (logon name), separator (the @ symbol), and domain name (UPN suffix). Important A UPN is not the same as an email address. Sometimes, a UPN can match a [...] (ID:448)

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Troubleshooting authentication problems when migrating from Google

Problem: You are unable to perform a migration from Gmail or Google Workspace (formerly G Suite) via the IMAP protocol. The following error message is displayed: [AUTHENTICATIONFAILED] Invalid credentials (Failure) Solution: Starting May 30, 2022, Google has discontinued the support for using third-party apps to access Google accounts by [...] (ID:1000)

Troubleshooting migration problems caused by conflict with Outlook

Problem: When connected to a source Exchange server via the MAPI protocol, you are unable to continue the migration after installing the Office suite that includes Outlook. You receive the following or similar error message: Migration process has been terminated. System.ServiceModel.FaultException: Unable to access mailbox: '' Solution: [...] (ID:994)

Outlook (client-side) signatures get too large margins in Gmail mobile apps

Problem: When someone opens a message from you in Gmail for Android or Gmail for iOS, the signature you added to the message in Outlook for Windows (client-side signature) is displayed incorrectly with too much whitespace between individual signature elements. Solution: Modern signatures with photos, banners, etc. use the HTML language [...] (ID:992)