27 09, 2018

repadmin /syncall RPC Server is unavailable – ipv6 problem

By |2018-09-27T09:57:30+01:00September 27th, 2018|Active Directory, Windows Server|0 Comments

  Recently I was cleaning up our DNS system after adding new NICs to the server and during this process I accidentally disabled DNS service on IPv6 protocols. I am perfectly aware of dangers of disabling IPv6 in recent Windows versions(2008 and up) but somehow I decided that DNS servers shouldn't listen or respond on [...]

19 07, 2018

How to refresh Offline Address Book in Outlook

By |2018-07-19T15:03:21+01:00July 19th, 2018|Errors and fixes, Exchange, Powershell|0 Comments

Sometimes you need to refresh offline address book in Outook, especially when user's SMIME certificate was refreshed(some other user's of course) but your outlook keeps the old one even though download of new address book was issued from the menu. Updating Offline Address Book(OAB)  in cached mode can take up to 24 hours no matter [...]

11 07, 2017

How to block executables from APPDATA

By |2017-07-11T09:10:38+01:00July 11th, 2017|Active Directory, Windows Server|0 Comments

While searching for some useful GPOs I encountered very nice thread with clear and thorough explanation about how to restrict/whitelist locations and file types that can be executed in Windows OS using Group Policy Object. Commenter state that using this method he basically got rid of all threads in his environment and analysing his approach [...]

22 04, 2016

How to set ntp server in Windows Server

By |2016-12-22T21:35:10+01:00April 22nd, 2016|Microsoft, Windows Server|0 Comments

When running an Active Directory environment based on Windows Server it is critical to have proper time synchronization in order to keep authentication going. Time difference larger than 5 minutes may result in authentication failures on clients and error event logs on Active Directory Domain Controller. Standard time.windows.com sometimes is not responding or can't be [...]

1 04, 2016

Installing Microsoft Exchange 2013 on Windows 2012R2

By |2016-12-22T21:35:10+01:00April 1st, 2016|Exchange, How-To's, Microsoft|0 Comments

Microsoft Exchang 2013 installation guide on Windows 2012 r2. I deploy two Mailbox servers as well as two Client-Access-Servers. All running on four Windows 2012r servers from which two of them are acting as Active Directory domain controllers. This is first part of the series, later on I will try bo build a CAS HA as well as Mailbox Database availability group. Stay tuned!

5 02, 2016

MDT modify wim image – temporary user profile fix

By |2016-12-22T21:35:10+01:00February 5th, 2016|Errors and fixes, Microsoft|2 Comments

Sometimes when you prepare or update an wim image for MDT you realize that you forgot to add/remove something. Common thing that happens after testing the image is that sysprep or YOU - forget to remove user account from registry (or via compmgmt.msc) but only delete user directory in c:\Users. In that case when you deploy [...]

16 06, 2015

How to rename Windows Server 2012 domain

By |2016-12-22T21:35:10+01:00June 16th, 2015|Active Directory, How-To's, Microsoft, Windows Server|0 Comments

There are times, when after creating and setting up domain environment you realize that you made a mistake in naming convention. For example domain with .local or .intranet was used. According to Microsoft and many sources like for example mdmarra.com blog you should avoid TLD and avoid above names since they are now sold by ICANN and [...]