We have set our attachment limit size to 10Gb for a very long time. About 6 weeks ago, we upgraded to 7.11.0 and moved to Data Center, and now our users cannot upload attachments larger than 2 Gb. The Admin console still says 10Gb.
Has something changed with regards to either 7.11 or Data Center?
Addendum: The maximum number of attachments per upload is 5. Coincidence?