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 spam troubleshooting in Office 365

When talking about Spam we can define just two scenarios: False-Positive – Valid emails are seen as spam by Office 365 False-Negative – Spam emails are delivered into my Inbox folder. Note please that I said Inbox folder, as spam emails that are delivered into the Junk folder or to Exchange Online Protection hosted Quarantine,…

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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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How to purge a soft deleted mailbox in Office 365

We have recently changed the way, removing an Office 365 user with attached mailbox, behaves. Previously: If we deleted an active user while he was still licensed, his mailbox would go into a “soft deleted” state and could have been recovered, just by restoring the user. If we also purged the MsolUser from Office 365…

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Migrate public folders to office 365 – Cleanup items larger than 150 MBs

There is a size limit for items in Exchange Online which is currently set to 150 MBs. Trying to migrate larger items will result in failures. You could also use the -LargeItemLimit switch to not allow these items through, but the below procedure allows you to filter and view these items and decide what to…

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Guide on how to recover Deleted Items for a mailbox in Exchange Online

A comprehensive guide on how to recover Deleted Items for a mailbox in Exchange Online  This guide is intended to help both Exchange administrators and regular users that are comfortable using some advanced troubleshooting techniques in order to restore mailbox content. IMPORTANT: Please note though that if the emails were deleted more than 30 days ago,…

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Remove Public Folders from Favorite

Remove a Public Folder Favorite using MFCMAPI     As you probably already know, in Exchange Online, you can access Calendar and Contact Public Folders through OWA. To do so, you can follow the steps described here or more detailed here. However, what happens if you decide to un-favorite a public folder from Outlook, but…

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