How to re-enable inactive mailbox from litigation hold in exchange online using Power Shell(Manual)

When users leave the company you might want to retain the email for a longer period than the default 30 days. By enabling litigation hold you can retain mailboxes longer than 30 days, before you disable a user you can set the litigation hold to any value you would like. But at some point you might need the mailbox to be re-enabled for some reason. In this manual I am going to explain how to do it.

STEP 1: Open a new Power Shell window and type the following command

Import-Module ExchangeOnlineManagement
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Backup your Office 365 environment!

In the past two years, Over 50 percent of businesses experienced an unforeseen interruption, and the vast majority (81%) of these interruptions caused the business to be closed for one or more days.

Did you know that 80 percent of businesses suffering a major disaster go out of business in three years, while 40 percent of businesses that experience a critical IT failure go out of business within one year. In the case of suffering a fire, 44 percent of enterprises fail to reopen and 33 percent of these failed to survive beyond 3 years…

It’s a common mistake to think that Microsoft takes core of backups for your Office 365 environment. Yes, they do make backups, every 12 hours with a retention of 14 days. However, this is only designed for emergency purposes, and if you need it your self, they will charge you for that.

But then you might think that there is a recycle bin and versioning, yes, but these are limited as well. For email the retention is just 30 days, and for SharePoint it is 90 days. This can extended with the E3 and E5 subscriptions. But is this a real backup? and can this guarantee save data retrieval in case of a disaster? the answer is NO!

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