How do I see what distribution lists I'm subscribed to in Outlook?

The easiest way is to do the following:

1) Open Outlook

2) Click the search people field (towards the upper right):

3) Search for your name/users name

4) Select "membership" tab and all groups you're a member of are listed below.

From OWA (if available) you can simply go to the 'options' cog in the upper right of the screen and then on the left side select 'groups' and you'll see your group membership

For OWA (Outlook Web Access) as of 2021 go to:

• Cog icon (top right) > View all Outlook settings > General > Distribution groups

It may take a while to load but should eventually show 'Distribution groups I belong to'