Category Archives: Office 365

Office 365: Give one user access to all calendar’s

By | 08/01/2019

Firstly, connect to Exchange Online Powershell, like described here: Then copy-paste this to a powershell.ps1 file, like calrights.ps1: Foreach ($mbx in get-mailbox){ $calendar=$mbx.alias+”:\Calendar” Add-mailboxfolderpermission -identity $calendar -user call -AccessRights Reviewer } USERNAME is the user you will give the rights spcified, here is is the user “call” PERMISSION is the permission level (role) you want to give… Read More »

Enable-RemoteMailbox –ExchangeGuid is mandatory on UserMailbox

By | 20/12/2018

During a recent move from on-premise Exchange 2010 to Office 365 Hybrid, I wanted to create a new user in the AD and then enable a mailbox for it afterwards, this gave this error in Exchange 2010 Powershell: Enable-RemoteMailbox -RemoteRoutingAddress error: ExchangeGuid is mandatory on UserMailbox. Database is mandatory on UserMailbox. After troubleshooting… Read More »

How to migrate large mail items to Office 365

By | 17/12/2018

When migrating mailboxes to Office 365, you may get this error is the migration window: “Request ‎’‎’ has already encountered more than ‎’5‎’ large items and can‎’t be given a limit of ‎’0‎’.” This is due to the default mailboxplan, it only allows for mailitems, that are max. 35MB. This can be changed through Exchange… Read More »