How to generate a message trace with more than 5000 lines in PowerShell

Applies to: Exchange Online, Exchange Online Protection.   This scenario is addressed to companies that generate high mail flows or use multiple applications to relay emails. Many admins are at some point facing a situation where analyzing a complex transport scenario is needed, this being translated into generating lengthy message traces.   The purpose of…

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Why Exchange Online Protection didn’t block this virus and what can I do?

Before proceeding with the core part of this article, I would like to describe a bit the Exchange Online Protection malware filter. Appendix EOP – Exchange Online Protection O365 – Office 365 OWA – Outlook Web App EOP Anti-Malware protection is a layered system using multiple anti-malware scan engines in order to protect against all…

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Basic mail flow troubleshooting in Office 365

In this article I will talk about four major mail delivery scenarios in an Office 365 environment. A. 3rd Party to Office 365 B. 3rd Party to Hybrid C. Office 365 to 3rd Party D. Hybrid to 3rd Party Before proceeding with the mail delivery scenarios in an Office 365 environment, I would like to…

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