I was hoping I could get some guidance here. I am fairly new to my organization, and have inherited the admin duties of multiple Sharepoint sites that many different users throughout my department utilize. Everything had been fine with these sites so far, until late last week when, all of a sudden, many people began stating they do not have access to the sites anymore. All of them had previously had access to the sites for months, but now they cannot access it anymore. I did not change anything in any of the sites before this. The other thing that is weird is that even when I accept the access request emails that keep coming through, the users come back to me and state that they STILL do not have access to the site. When I check their permissions, it shows that they should have access. Searching through the permissions, nothing is jumping out as odd. This is also true when I look into the unique permissions too. Granted, the amount of groups, users, etc in these sites is a bit ridiculous so it is hard to sift through it all and figure it out, but it looks like everything should be fine. I don't understand why these users would still not have access even when given directly when I accept their requests.
One thing I noticed is that all of the users that have reached out to me about having issues with access are remote employees - They all are on the server using a VPN. Has anyone ever seen something like this happen before? Sudden widespread access issues with no apparent reason? Any insight would be appreciated. I am fairly new to SP and struggling with finding a solution here.