As I did quite some Exchange migrations (including single as well as multi tenancy environments) I was always wondering whether there are any additional post migration tasks that need to be addressed before you start removing your legacy Exchange server(s) from your organization. For instance, as with migrating from Exchange 2003 to, say, Exchange 2010 you had to update Global Address Lists, Address Lists, Offline Address Books, et al to the new Exchange 2010 version by executing the corresponding cmdlts, e.g. Move-OfflineAddressBook. Now when migrating from Exchange 2010 to Exchange 2016 (or even just from Exchange 2013 to Exchange 2016 with both having an almost identical architecture) what remains of those post migration tasks? Which ones are a necessity? What kind of architectural changes require you to think different and adjust certain settings prior to removing your legacy Exchange server(s)?
By talking about post migration tasks, what do I mean? Well, after you've successfully migrated all your databases, mailboxes, public folders, send/receive connectors, et al, what's still left? Maybe the not so obvious parts of your Exchange infrastructure that need addressing as well in order to avoid any unwanted behaviors and/or errors after you removed the last legacy Exchange server from your organization.
If you want to use your NetScaler for all things that need to be accessible from the outside, over a single IP address, that poses an issue. As is usually a problem with small to medium sized businesses which only have one public IP address at their disposal, and need to implement features like a fully functional RDS environment (with RD Web Access, RD Gateway, etc), a XenApp/XenDesktop evnironment with StoreFront, and even AD FS, say, for Office365. Generally all these services require port 443 (https) to be fully functional, and you can only set up one distinctive IP address on your NetScaler providing this service, pointing it to your internal resources via Firewall rules, thus leaving you with only one option: NetScaler's Unified Gateway and Content Switching features.
After logging into Exchange 2016's ECP you receive an HTTP Error 500 (same goes with OWA):
Searching the internet ends up with several possible solutions to this issue, ranging from missing System Attendant Mailboxes, to bogus ADSI settings regarding the Exchange CAS Service. I tried several of them to no prevail.
This short blog describes how to enable NetScaler 11's Content Switching feature to proxy your AD FS infrastructure thus getting rid of a dedicated AD FS Proxy server.
I had quite some trouble installing and configuring AD FS 3.0 on a Windows Server 2012 R2 with a SQL Server 2005 Standard Edition server to store my Configuration DB in. Therefore I wanted to share that information, hoping it might be useful to others as well.
I came upon this quite frequent issue with my XenDesktop 7.8 Hosted Shared Desktop environment based on Windows Server 2008 R2. Folder Redirection via GPO is in place, whereas Citrix User Profile Management is not used.
In order to make this work, check out the Prerequisites section, and read my other articles about installing and configuring AD FS prior to setting them up with ShareFile and/or NetScaler. This setup requires multiple steps with functional verification tests in between each step in order to minimize sources of error.
Prerequisites:
Public Signed Server Certificate adfs.domain.com
Firewall configuration allowing external traffic destined for your internal AD FS server to pass through (https, Port 443)
AD FS related errors can be found in the Event Log by expanding the Applications and Services Logs node, and navigating to AD FS 2.0 \ Admin (for Windows Server 2008 and 2008 R2):
My working ShareFile Single sign-on / SAML 2.0 Configuration with AD FS 2.0 looks like this:
Encountered error during federation passive request.
Additional Data
Exception details:
Microsoft.IdentityServer.Web.RequestFailedException: MSIS7000: The sign in request is not compliant to the WS-Federation language for web browser clients or the SAML 2.0 protocol WebSSO profile.
at Microsoft.IdentityServer.Web.Dispatchers.UnknownRequestDispatcher.DispatchInternal(PassiveContext context)
at Microsoft.IdentityServer.Web.PassiveProtocolHandler.ProcessRequestInternal(PassiveContext context)
at Microsoft.IdentityServer.Web.PassiveProtocolHandler.ProcessRequest(HttpContext context)
ADFS v2 does not support WS-Federation POST sign-in, only GET.
HTTP Error 401. The requested resource requires user authentication
It turned out I had to start the AD FS service with proper credentials. As I had issues with launching the service, I switched it to LOCAL SYSTEM, which in return caused this particular issue. So, first I had to remedy the issue of failed service start by configuring the SPN for the service account, and providing internet access to my AD FS server in order to enable querying if CRL through .NET. Then I adjusted the corresponding Application Pool in IIS on my AD FS server in order to reflect the AD FS service's account. In the end I was able to start the service properly. Afterwards SAML SSO from internal networks worked as well.
Now as we have successfully configured a working SSO environment using ShareFile and AD FS, we can go the extra mile and add NetScaler to the equation, of course as a means of security enhancement. As you should never ever expose an ADFS server to the internet, you could use NetScaler as a Proxy. Read more about in my blog article https://blog.ollischer.com/citrix-netscaler-v11-how-to-setup-your-netscaler-as-an-ad-fs-proxy.
Errors:
"SAML Assertion verification failed; Please contact your administrator", i.e. incorrect IDP certificate configured on NetScaler
Http/1.1 Internal Server Error 43531
Run one of the following commands from the shell prompt of the NS to view the real time hits on the (as per CTX138840)
authentication policies and session policies applied on the NS Gateway vServer:
nsconmsg –d current –g pol_hits
rewrite policy bound at a global level or to a load balancing, content switching, or NS Gateway vServer:
nsconmsg –d current | egrep –i rewrite
responder policy bound at a global level or to a load balancing, content switching, or NS Gateway vServer:
nsconmsg –d current | egrep –i responder
In order to troubleshoot authentication with Aaad.debug (as per CTX114999) run the following command from the shell prompt of the NS:
cd /tmp
cat aaad.debug
Another Event ID 364 error message:
MSIS2001: Configuration service URL is not configured.
MSIS7012: An error occurred while processing the request. Contact your administrator for details
After checkings the AD FS 2.0 service I discovered that it was not running. When trying to start the service it did not start and subsequent Events 7000 and 70009 were logged in Event Log Viewer. It turned out that the server hosting AD FS 2.0 need internet access or you need to disable generatePublisherEvidence for .NET 3.5. See:
Service Control Manager (SCM) is timing out the service start before it is complete. This is usually due to lack of internet connectivity from the AD FS 2.0 Federation Server or AD FS 2.0 Federation Server Proxy. At service start, when generatePublisherEvidence is enabled for .NET 3.5, the server will attempt to connect to crl.microsoft.com over TCP port 80. AD FS 2.0 does not rely on a positive or negative response from generatePublisherEvidence, and the default value can cause Service Control Manager to time out while waiting on the TCP/80 connection to fail to connect to crl.microsoft.com.
Exchange 2016 - Poor Outlook 2016 Performance - Troubleshooting - Server-side or Client-Side?
Just recently I came across a newly installed Exchange 2016 environment and had to analyze a "poor performance issue". I started my investigation by asking ... Google! Of course, everybody does it, but is not willing to commit it. This left me with the idea of creating another blog article on this matter. On the bottom of my blog article you'll find all relevant URLs which gave me (more or less) useful information during my time debugging the problem. As it turned out, there are multiple aspects to consider.
After migrating to Exchange 2013 and/or 2016, and still having a couple of Microsoft Outlook 2007 installations left, the following issue started popping up: as soon as users launch their Outlook 2007 (while already being migrated to Exchange 2013/2016), they were always prompted for their Logon Credentials, though Remember my password has been checked:
Just recently I came upon an Microsoft KMS error stating Error 0x80070054 - Storage to process this request is not available.
This error was quite annoying as at first I didn't had a clue what this was all about. The error message itself could be quite misleading and left me poking in the dark... Eventually I found a possbile solution.
This blog article as been updated. Pls consult the updated section at the bottom of my post.
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