Exchange

When migrating mailboxes between Exchange versions using the Exchange Admin Center you may receive the error:

Nullable object must have a value.

This error will appear when you navigate to the Recipient > Migration tab and click View Details on a migration batch. In the screenshot below we are examining a migration batch named “Test Migration to Exchange 2016” which contains two users. We are attempting to move these two users from Exchange 2013 to Exchange 2016.

From this screenshot, you will notice the Status column reports both users as successfully migrated. However, the Data Migrated and Migration Rate attributes in the right-hand pane are missing values. For an executed migration batch these attributes should contain metrics. [Read more…] about ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Nullable object must have a value (when migrating mailboxes)

When upgrading to Exchange 2016 you may receive the errors, “There was a problem loading your options” & “Exchange Server doesn’t support the requested version”.

Both of these errors are centered around the add-ins feature.

What are add-ins?

First introduced in Exchange 2013, add-ins are apps that you can globally distribute to all your Outlook clients, whether they be the full Outlook client, Outlook Web App, or, Outlook for iOS and Android.

Add-ins include features such as Bing Maps, which will identify an address in an email and automatically load a web-part displaying a map. Or, simply the ability to identify action items within an email.

Exchange ships with a few add-ins out of the box. Additional add-ins can be downloaded through the Microsoft store or uploaded via a custom XML file.

The real beauty of an add-in is that you can centrally manage it via the Exchange Admin Center. Much easier than deploying Outlook add-ins with traditional endpoint management software. Plus it ensures everyone is always using the latest version of an app.

There was a problem loading your options (“add-ins”)

While in coexistence with an older version of Exchange your users may receive the error “There was a problem loading your options”. They receive this error when trying to manage their add-ins via Outlook Web App. This error prevents the users from seeing or managing their add-ins.

[Read more…] about Exchange Server – There was a problem loading your options (“add-ins”)

Ran into an issue recently where Outlook was working fine, however Android devices, particularly mobile phones, would throw an error that the certificate was invalid when configuring an Exchange mailbox via the GMail app. The error was:

Certificate not valid

The Gmail app can't guarantee the security of this email address. Your messages would be at risk.

When clicking Advanced we received more clarification that the certificate was not trusted. However, we could quickly see that the correct certificate was being presented to the Android devices and it clearly wasn’t an issue with the date.

Certificate not trusted

Contact your email provider about this error, or proceed with username (unsafe).

We then tested our certificate with DigiCert’s SSL Certificate Checker. This is a great tool to confirm that the certificate is installed correctly and that the certificate path is valid. You can check any certificate with this tool. It does not have to be a certificate issued by DigiCert. In our case we were testing our GoDaddy certificate with this tool. [Read more…] about GMail App fails to connect to Exchange – Certificate not valid