CE 10.0, Viewer changed from ActiveX to DHTML automatically

[techie2]

Hi,

Using CE 10.0 + SP4, CR 10.0, CMS is SQL Server, Reporting database is Oracle 8i, Authenticating againts LDAP. This environment has been up and running from couple of years
now.

Whenever we have new LDAP user in the system, I assign the folder to each user and along with these rights, I also setup their Viewer to be ActiveX viewer.

Last week, all the users automcatically chnaged to DHTML viewer. We have user base of 1000+ users and I can not change it manually to ActiveX viewer.

I looked at server and logs but could not find anything helpful to troubleshoot further.

Any ideas or directions on what else to look to find the RCA.

Thanks

techie2