@Cruz, Felix Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Thank you for your time and patience!
The default limit when using basic networking is 1k. If you can, use a standard networking and it gets rid of that limit.
As for session limits. I do believe there’s a 5k limit for individual user connections (single IP connecting to ANF). If you mean 5k users/session and not a single session, I don’t think that’ll be of issue at all. You’ll need to engage with engineering/support teams to understand ONTAP specific config to know what the specific limits may be.
For more information refer to this article: https://video2.skills-academy.com/en-us/azure/azure-netapp-files/azure-netapp-files-network-topologies#constraints
Please let us know if you have any further queries. I’m happy to assist you further.
--------
Please do not forget to and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.