Mailboxes not being migrated to Exchange Online because their sizes exceed the mailbox target quota of 50GB

After the recent changes related to increasing of the mailboxes size in Exchange Online from 50GB to 100GB, we are noticing a common error that the move of mailboxes from Exchange 2010, Exchange 2013, Exchange 2016 to the cloud can’t be completed because the size of the moved mailbox is exceeding the target quota of…

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Outlook in Online Mode is not working as I am expecting

This article is meant to threat the performance from the network perspective. Please keep in mind that the overall performance analysis means also Outlook Add Ins, Antivirus, RAM, CPU, NIC and HDD. This article represents my experience during my years as a Support Escalation Engineer in Microsoft, handling performance degradation cases while Outlook is connected…

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How to resolve the following issue: you re-enable an account of a returning employee, you assigned a license, but the mailbox is not provisioning.

A lot of customers open cases with Office 365 support saying: the mailbox is not provisioning. In this article I will explain how this can happen and what can we do to solve the situation. We have the following scenario: – we have a Hybrid Exchange Configuration, Local AD, local Exchange Server, DirSync, Office 365…

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Moderated Group scenario in Hybrid configuration

If we have a Hybrid Environment and we want to use Distribution Groups (Lists) with moderation, I will not work “out of the box” and several types of errors can be received. In this article we will what additional steps must be performed to make it work. Why we need moderation? Because sometimes it makes…

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Move folders and subfolders with EWS Managed API, in Exchange Online

Remaining on the same note from my previous post that speaks about email messages moves from a source folder to a target folder, I considered taking into account also the scenario where OWA users would like to move folders along with their subfolders under a target folder.  If you use Outlook, you can easily perform this task by dragging…

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Move email messages from a source folder to a target folder with EWS Managed API 2.2, in Exchange Online (including archive mailbox folders)

I have recently heard that there are customers interested in finding a way to move hundreds of emails from a source folder located in their primary mailbox, to a target folder from within their archive mailbox. Although, I am still an apprentice when it comes to programming, I have managed to create the script below which helped me…

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Recover soft-deleted mailboxes in an Exchange Hybrid scenario

I have encountered a lot of situations where IT Administrators have difficulties in recovering a mailbox that was deleted from Office 365 active mailboxes, while having an Exchange Hybrid environment, so I’m creating this article to help Administrators perform a correct recovery and to avoid the situations like creating duplicate users with blank mailboxes. Scenario1: Recover…

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What to do when emails sent to a Dynamic Distribution Group are received by unwanted external recipients.

A DDG (Dynamic Distribution Group) is a mail-enabled Active Directory group, object that is created to expedite the mass sending of email messages within an organization. Unlike regular distribution groups that contain a defined set of members, the membership list for DDG is calculated each time a message is sent to the group, based on the…

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