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I had the strangest behaviour when I set up some 40 users with Kerio mailboxes yesterday.

All users are in an Open Directory on a 10.6.2 server. Kerberos works flawlessly with logins and such.

Kerio 7.0.1 with the OD connector is installed and configured correctly.

I added a bunch of directory users to my Kerio server. Logging in to most of them worked with their password, but for some it just wouldn't work. Logging in via afp or smb worked fine with the provided password tho (in this case via PasswordServer, as these machines are currently standalone users). I could reset the user password, nothing happened. The debug log of Kerio just told me "invalid credentials". When I deleted the user and recreated it, it worked (different uid though).

This was just a minor hiccup as no users used any relevant other services and I could just reconnect them to their user folder just fine.

Still, out of curiosity, what could cause problems like this?

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I've been having the same issue.

I had to fall back to Password Server. About 10 percent of users passwords don't work but only in Kerio. As soon as I'd fail back to password server it would work fine for everyone.

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I've also seen this issue. It's happened for us on both Kerio 6.7.x and 7.0.1, our OD server is running 10.5.8.

I've been able to get Kerio logins working by going into the OD Workgroup Manager, click the user, then Advanced. Now change the User Password Type to Crypt, enter a new pass and Save.
Change the Password Type back to Open Directory and save again, now it works.

This process preserves the uid, but generates a new Password ID, FWIW.
Weird, indeed.
Lyle M

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I experienced a similar issue. For me, the fix was to delete the user's entry in the password server slot on OD and create a new entry and Kerberos principal.

The easiest way to do this is:

1. ssh to your Open Directory server or open the terminal on the OD server
2. Enter the following command:

sudo slapconfig -settopasswordserver user directory-admin userspw diradminspw

See man slapconfig under the 'Password Server' section for usage details.

In 10.6, I recall you have to leave out the two passwords and have the command prompt for them.

I've only gotten this to work on the OD server itself (locally or via ssh). As best I can tell, the kerberos issues affected users that I had migrated from older OD servers via slapconfig -mergedb.

I thought my OD problems were behind me, but when I recently switched Kerio to use Kerberos vs. the Apple Password Server, a handful of users began generating password errors.

I used the OD>Crypt>OD trick for years ( ). It sorta' works, but you won't see the Kerberos principal in WGM under AuthenticationAuthority, which can bite you the next time you migrate users to a new server.

Lyle Millander
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