Gertjan's blog

Today I faced a problem. The ADFS certificate that we used for Office 365 was going to expire over 2 weeks. However the connection to Office 365 already was failing. I do not exactly know what the policy is for ADFS of outdated certificates but it looks like ADFS already invalidates certificates two weeks before they really expire. This is not an Office 365 problem because other services that used our ADFS also had the same problem. To solve it on the other services it was simply updating the thumbprint of the trusted issuer but how do you do this in Office 365? I succeeded with the following steps Start up "Microsoft Online Services-module for Windows Powershell". You can download this module for PowerShell if you not already done this on ( http://onlinehelp.microsoft.com/en-us/office365-enterprises/ff652560.aspx  ). Connect to your Office 365 environement by the following statement $cred = Get-Credential Use your first admin account to login (the account with th

Add external users to Office 365 Team Site It is possible to invite external users to your team site in Office 365. This blog describes how. First thing you need to do is enable the "External user invitations" site feature. You can do this by navigating to "Site Actions" => "Settings" => "Site collection features". Here you need to enable the "External user invitations" feature. When you activate the feature you get an Share Site option in the Site actions drop down. With this option you can invite external users. When you click this "Share Site" option you will get a form that looks like the form below. You can choose what right you give the user, a visitor (read only) or a site member (collaboration). You can just fill in an email to send the invitation to, this does not have to be an existing account. Also you have the option to fill in a personal message that will be included in the