Error message when changing permissions in Public Folders

We use Exchange 2003 on Server 2003 with Outlook 2003 for the clients.
I'm trying to change the client permissions on a Public Folder but when I try to apply the changes I get this error message:

An unknown eror has ocurred.
ID no. 80040305
Exchange System manager.

I tried deleting the user for that particular Calendar in the Public Folders to add him again but when I click Ok I get the same message and now can't add the user back. I've done the permissions change from both, Outlook 2003 where I'm the owner of the folder and from Exchaneg System manager.

Any help will be greatly appreciated!
menendezaAsked:
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isaman07Commented:
YOu were logged in as who?
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menendezaAuthor Commented:
My account is a Domain Admin.
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isaman07Commented:
Not enough, you need to give yourself exchange full administrator role. You can do this in ESm, right click the name of the organization and choose delegate, choose the account that you use and choose exchange full administrator role, test it again and let me know.

Harout
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menendezaAuthor Commented:
Yes, I also have Full Exchange Admin rights with this account. I received a post from the Tech Net forum suggesting to use an application called pfdavadmin which can be downloaded from Microsoft. Looks like a LDAP editor for Exchange. I applied the permissions thru that application and it worked. Also i was able to run a "fix" option and now I can also edit permisions from ESM or Outlook 2003

Thanks!
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ak_sridharCommented:
PFDAVAdmin tool will help on this to fix this issue in exch 2003 servers
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