Microsoft Exchange and Remote Desktop Services Specialists


Microsoft Exchange Server and
Blackberry Enterprise Server news, views and fixes.

Cross Site DAG Issue When Using A Load Balancer

Just deployed a new Kemp Load Balancer with a client which promptly broke their cross site DAG.

Usual horrible error:

[PS] C:\Windows\system32>Get-DatabaseAvailabilityGroup -Status

WARNING: Unable to get Primary Active Manager information due to an Active Manager call failure. Error: An Active

Manager operation failed. Error The Microsoft Exchange Replication service may not be running on server XXX-3. Specific

 RPC error message: Error 0x6ba (The RPC server is unavailable) from cli_AmGetDeferredRecoveryEntries.


(server xxx-3 is the remote server).

Discovered that the problem was due to an option enabled on the Kemp called Enable Server NAT (SNAT). You can find this under System Configuration, Miscellanious Options, Network Options. Disabling that corrected the issue almost immediately. Seems that the NAT broke the DAG. 

Free BES 10 CALs when you Activate a Blackberry 10 Device

Looks like Blackberry are running an offer for free BES 10 CALs.

Activate a Blackberry 10 device and get two free CALs.


Activate a Blackberry 10 device between July 1st and August 31st 2013 and for each device you will get TWO free CALs. These CALS are the EMM Corporate type so will work for Blackberry 10 devices and Android/iPhone. At current prices they are worth almost £70 each.


The BES 10 software is free (trial download on the link above).


The window to claim the free CALs is quite small, so Blackberry have provided a link to be told when the registration process is open. 

A New Take on the Exchange Management Shell Startup - Keberos Error

I was recently asked to look at an Exchange server giving the common PowerShell connection failure due to Kerberos authentication. 

The following error occurred while attempting to connect to the specified Exchange server 'rpi-exchange.rp.local':

"The attempt to connect to http://rpi-exchange.rp.local/PowerShell using "Kerberos" authentication failed: Connecting to the remote server failed with the following error message: The connection to the specified remote host was refused. Verify that the WS-Management service is running on the remote host and configured to listen for requests on the correct port and HTTP URL. For more information, see the about_Remote_Troubleshooting Help topic. "

The usual reasons for this error are well documented and I am not covering them here. After spending an hour going through the usual suspects, I started to look for anything else, as this was giving a Connection Refused error, which wasn't hugely documented past the Remote PowerShell permission. 

I then had a brainwave. I was working on a system in a school. Schools have pretty restricted Internet access in most cases. This usually means a proxy. 

Netsh winhttp show proxy 

That command immediately showed there was a proxy, running

Netsh winhttp reset proxy

Cleared the proxy settings and allowed the Exchange Management Console to start correctly. 

The client was then advised to check their proxy configuration settings, specifically the exceptions list so that the correct ones were in place, as I feared that next time Group Policy applied the proxy settings, the change would be reset. 

Exchange 2010 Service Pack Support Dates

From conversations with clients, it would appear that a lot of people are unaware that Exchange 2010 Service Pack 1 is no longer supported.

I am still seeing clients who haven't upgraded. These range from SBS users right up to multi site Enterprise clients. 

The Microsoft support policy on service packs is that when a new service pack is released, the previous service pack only is supported for a further 12 months. 

The support of Exchange 2010 SP1 ended in January 2013, Service Pack 2 ends in April of 2014. 

If you are still on the original release, known as RTM, then support ended in November of 2011. 

This shouldn't be confused with support of the product Exchange 2010, which will be supported (as long as it is on the latest service pack) until 2015, with extended support until 2020. 

The full table for support can be seen here:

If you are curious about Exchange 2007, then those dates can be seen here:


Free BES 5 Upgrade for BES 4.1 Users

Still using BES 4.1? Then this blog posting will be of interest to you. 

There were lots of announcements from Blackberry last week during their convention, but one that probably got buried in all of the handset news is probably of interest to Exchange administrators. 

If you are still on BES 4.1 then you can now get a free upgrade to BES 5. That is the full BES, not BES Express.

You can use the transporter suite to migrate to the new version of BES with almost no downtime for the end users. 

Note - this is the full BES 4.1, not the older Professional or other free options. If you are using BPS then you should move to BES Express.

The reason for Blackberry doing this is to encourage moves to Blackberry 10 devices. One of the features of the BES 10 version is able to manage both Blackberry 10 and older devices from a single interface. However for that to work the older devices need to be on a BES 5 server. 

If you are using BES 4.1 now is the time to upgrade.

If you have devices still using OS 4.x then it would also be a good time to look at upgrading those, at least the OS, but preferably the device as well. 

If you are in the UK, then I can assist you with this upgrade, please use my business web site to contact me: