Notes This is an issue found in my working version of Exchange, which is Exchange 2013 CU 11. It may exist elsewhere, but this is all I've got to test with. Problem Using the Exchange Admin Center, you either tried to import a certificate or complete a certificate request. It may have done nothing on the first attempt, but it gave you this error on the second attempt. Description What you're seeing is that you have a cert that was successfully installed on the server the first time … [Read more...] about A special Rpc error occurred. Cannot import certificate. A certificate with the thumbprint already exists.
IMAP testing can be a little tough, especially when you are on a production server. Here's the first things I'd do to make sure IMAP connectivity is working OK: Run a Telnet from a Telnet Client to ports 143 and 993. 143 is your TLS port and 993 is for SSL IMAP connections: [crayon-5848f5a0674b8699652541/] You can use your public IP. You're looking for a black box or a banner that you've set up with a virtual service listening on the port. If you get a denied connection there might be … [Read more...] about Exchange 2013: Test IMAP Connectivity
It's nice to see how your Exchange environment is doing without having to dig too deep. The HealthCheck feature is perfect for this, but some commands just can't be committed to memory. Below are some common Exchange Health Check commands as well as a little explanation to help you use Exchange Shell. [crayon-5848f5a067ef9181738715/] Pretty straight forward. You'll get your current server's health results. Hopefully everything says Healthy and if you haven't customized anything, the state of … [Read more...] about Some Helpful Exchange Shell Commands to Help with Health Checks
An exchange server I manage had up to 30GB of log files. Maybe you need log files, maybe you don't. There are a number of methods in dealing with log files when you do need them. Here's an awesome web page giving you a ton of different options. I chose the option to remove log files after 30 days. Note that these are for IIS logs, not Exchange Logs. http://www.iis.net/learn/manage/provisioning-and-managing-iis/managing-iis-log-file-storage#02 And the VBS Script that I'm now running in Task … [Read more...] about Script to delete or manage IIS Logs
We use Windows for a reason. It's hard for computer professionals to admit it, but the a GUI and the functionality behind an app, even a small one, can be really helpful. Sometimes there just isn't enough functionality in a command prompt or console. So when little apps come along that make our lives a bit easier, it's important to give them some recognition. CurrPorts is a little executable for Windows computers that helps us out. CurrPorts will give you a table showing all the information … [Read more...] about View Port Bindings via Windows based GUI – CurrPorts
While doing some end of the year vulnerability scans, we were getting some web servers coming back with some potential security threats, all too common in the IT world. Looking for a faster method to patch up these holes, I came across a very neat little tool Call IIS Crypto made by the good people at Nartac Software. Their explanation of the tool: IIS Crypto is a free tool that gives administrators the ability to enable or disable protocols, ciphers, hashes and key exchange algorithms on … [Read more...] about Disable Vulnerable Ciphers, Hashes, Keys, using IIS Crypto
Oh man, this was a tough one. A real doozy. First, here are my environment details where this was happening. MS Exchange 2013 CU6 (Issue was happening as far back as CU4) One Exchange Server managing all Exchange services and responsibilities Less than 50 mailboxes Overview Basically, every few days we'd get a call in the middle of the day from customers telling us that mail was being stuck in the Outbox in Outlook and mail would be put into the drafts folder in OWA. At first, we … [Read more...] about Exchange 2013 Mail Stuck in Outbox or Drafts – Have to restart Transport Service to resume mail flow
Have you ever seen one of these before in your logs? They pop up from time to time: The following fatal alert was generated: 10. The internal error state is 1203. They aren't anything to worry about. It just means a client somewhere is trying to access something using the wrong protocol. For example, someone is trying to log into OWA using http instead of https. That's all. These can essentially be ignored unless there are outrageous amounts or something is breaking during the … [Read more...] about Exchange Event Error: The following fatal alert was generated: 10. The internal error state is 1203.
System Setup: Windows Server 2012 with WSUS 3.0 and IIS 8 Installed Clients: Windows Server 2012 and Windows Server 2008 R2 You've done everything right but for some reason you just can't see the clients. Here's a quick check list: If you go to your SUS server, for example http://wsus you can see a blank page and not simply the IIS splash page You can ping between both the SUS server and your client Firewalls are turned off on both the SUS server and your client The group policy … [Read more...] about WSUS not detecting clients and not listing computers
Server 2003 is getting old, but sometimes it's very necessary to head back into some of your legacy systems to manage aspects of the domain. Group Policy Manager is not installed on Server 2003 by default. When you need it, you can quickly download it here: http://www.microsoft.com/en-us/download/confirmation.aspx?id=21895 The install steps are very fast. No reboot required. Afterwards you'll be able to manage group policy in the same way you do on Server 2008. … [Read more...] about Install Group Policy Management for Server 2003