Comments on: SharePoint Kerberos KRB_AP_ERR_MODIFIED Event ID 4 http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/ All the news that fits! Tue, 02 Mar 2010 23:07:26 -0800 http://wordpress.org/?v=2.8.5 hourly 1 By: Andy http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-122 Andy Thu, 04 Feb 2010 18:32:24 +0000 http://www.os.com/?p=28#comment-122 I ran into the exact same error this article describes. In my case, I was using a hosts entry to 'emulate' forward DNS. However, as hosts files only emulate forward DNS and not reverse, I ran into issues. I created a new FQDN on our real DNS server (with forward and rev entries), as well as an alternate access mapping in central administration for the new FQDN. After doing this, my kerberos issues were resolved. I ran into the exact same error this article describes. In my case, I was using a hosts entry to ‘emulate’ forward DNS. However, as hosts files only emulate forward DNS and not reverse, I ran into issues.

I created a new FQDN on our real DNS server (with forward and rev entries), as well as an alternate access mapping in central administration for the new FQDN. After doing this, my kerberos issues were resolved.

]]> By: Jim Spignardo http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-106 Jim Spignardo Thu, 22 Oct 2009 19:05:36 +0000 http://www.os.com/?p=28#comment-106 Just an FYI: We had several random users experiencing authentication issues and it turned out to be the MS Office Live-Addin that was the culprit. We removed this little demon and all our troubles disappeared. I would recommend hiding this update so that your users cannot install it. Just an FYI:

We had several random users experiencing authentication issues and it turned out to be the MS Office Live-Addin that was the culprit. We removed this little demon and all our troubles disappeared. I would recommend hiding this update so that your users cannot install it.

]]> By: Lance Chang http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-89 Lance Chang Wed, 06 May 2009 07:43:59 +0000 http://www.os.com/?p=28#comment-89 Dear All: I solved this problem! I found 2 new patches of OS: KB960803 and KB963027. These 2 patches let my search index failed and repeated logon my SSP admin site. So, I read these 2 patches description, follow the description's step and I solve this error. Dear All:
I solved this problem! I found 2 new patches of OS: KB960803 and KB963027. These 2 patches let my search index failed and repeated logon my SSP admin site.
So, I read these 2 patches description, follow the description’s step and I solve this error.

]]> By: Gavin Pollock http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-47 Gavin Pollock Wed, 29 Oct 2008 12:00:20 +0000 http://www.os.com/?p=28#comment-47 Hey there, We are running 2 load balanced servers, with a shared IP address for the farm. There are two sites: intranet (A record, with reverse DNS) mysites (CNAME to intranet) Is this going to be an issue in terms of reverse DNS? Cos I would have thought there was no way to have each as A records with reverse lookups for the same IP address. Thanks! Gavin Hey there,
We are running 2 load balanced servers, with a shared IP address for the farm. There are two sites:
intranet (A record, with reverse DNS)
mysites (CNAME to intranet)

Is this going to be an issue in terms of reverse DNS? Cos I would have thought there was no way to have each as A records with reverse lookups for the same IP address.

Thanks!
Gavin

]]> By: admin http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-40 admin Thu, 02 Oct 2008 17:57:49 +0000 http://www.os.com/?p=28#comment-40 Just make sure both forward and reverse DNS are properly setup. If forward is good, but reverse is not, Kerberos may still fail. Just make sure both forward and reverse DNS are properly setup. If forward is good, but reverse is not, Kerberos may still fail.

]]> By: yury http://www.os.com/blog/sharepoint-kerberos-krb_ap_err_modified-event-id-4/comment-page-1/#comment-39 yury Tue, 30 Sep 2008 19:35:04 +0000 http://www.os.com/?p=28#comment-39 Great info. Thanks. I'm about to change an IP of my Sharepoint server. Any tips on what to look out for? Great info.
Thanks.
I’m about to change an IP of my Sharepoint server.
Any tips on what to look out for?

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