Object reference not set to an instance of an object

We had a client that needed to have several SharePoint subsites published externally. After exposing the sites externally - everything worked fine except for checking documents in/out.

The client would get an error that said:

Object reference not set to an instance of an object

Wow...very descriptive. Thanks Microsoft.

After a little digging - we found that it was tied to Alternate Access Mappings.

Go to SharePoint Central Admin->Operations->Alternate Access Mappings.

Click Edit Public URLs.

Add the FQDN to the internet AAM and choose Ok.

Restart IIS.

Related Posts

folders-stacked-up-high-full-of-paper
Where, How and Why to Pin Documents
- If you've ever wondered what Microsoft programs allow pinning and how it might be useful, ...
woman_typing_on_laptop
Looking for a Job? Here's Some Tips for Optimizing Your Online Presence.
- Job hunting has evolved as employers have developed new ways of using the internet, social...
vision_image_for_blog_post_on_leadership
7 Leadership Principles from Dell That You Can Adopt To Become a Better Leader
- Dell made the top ten in the list of LinkedIn's Top Companies 2019. The company has revamp...