Hei bengt bengan,
There is no such specific limit of how many times can you reuse a set of "user credentials" on different computers.
Although it defeats the logic reason for having different user credentials, if everyone is using the same credentials then it is equal to none using any credentials.
If you have a set of users, try to use different credentials with permissions based on their needs instead of a generic set.
Read more:
https://learn.microsoft.com/en-us/azure/storage/blobs/storage-auth-abac-portal
https://learn.microsoft.com/en-us/azure/storage/common/storage-sas-overview
Please mark this as "answer" if it helped.