I used ADModify.net to modify the parameters OWA, IMAP, POP3 ... but if one of these protocols have been modified from the AD MMC, duplicate data. Is there any way to leave the default (empty)the protocolsetting? Thaks

To clear the values type null.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

but how can 1000 users at once?

Admodify, domain list, select your domain, select domain controller. Tick only users, click green arrow. This will enumerate all your users in your domain. Select all, next, exchange features tab, protocol settings. To disable tick the left box, to enable tick the left box and right box.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

But that only eliminates admodify values, but not if you changed from the AD. The doubles but does not eliminate