Change your Mail Transport Agent (MTA)

A Mail Transfer Agent (MTA) is a software that transfers electronic mail messages from one computer to another using a client server application architecture. An MTA is also called by a few other names such as – a Message Transfer Agent, Mail Relay, and Mail Transport Agent.

Some of the popular MTAs in use are Sendmail, Exim, and Postfix.

Fedora and Red Hat Linux distributions by default ship with Sendmail as their MTA. However, switching to another MTA such as Exim or Postfix is quite easy. Continue reading

Previous hop federated peer did not report diagnostic information

Previous-hop-federated-peer-did-not-report-diagnostic-informationHere you can see the screenshot of Snooper window with Skype for Business client logfile opened.

Previous hop federated peer did not report diagnostic information. This error can have the following symptoms: Continue reading

Outlook 2016: Clear Email Address From Auto-Complete

Outlook will offer to auto complete recipient address if you have ever sent them a letter before. If you want to remove an address from Auto-Complete list or clear Auto-Complete list in Outlook 2016 follow these steps:

Removing an address from your auto-complete list

  1. In Outlook, click the New button to start composing a new email.
  2. In the To: field, start typing an email address.
  3. Using the up and down arrows on your keyboard, select the email address you would like to remove from the suggested contacts list. Press the Delete key on your keyboard or press X sign next to the address.

Outlook-2016-delete-single-email-address-from-AutoComplete Continue reading

Manage updates settings in Windows Server 2016

Since Windows Server 2016 you will not find “Windows Update” section in Control Panel. Instead you can manage or enable/disable updates  in two ways: using sconfig or through Group policy.

Manage Windows Server 2016 updates with sconfig

Windows-Server-2016-manage-updates Continue reading

Play a video in a Skype for Business meeting

play-video-in-skype-for-business-meetingPlaying a video in a Skype for Business conference might be not so straightforward task. The caveat is that sharing your videoplayer or browser with youtube will not be enough: video will be displayed choppy and participants will hear no audio. This is because the video will be transmitted not as a stream to each participant but as a set of slides and there is no way to transmit audio here.

How to play a video with sound in Skype for Business meeting? Insert the video into PowerPoint file and share PowerPoint in Skype for Business meeting! Here is how: Continue reading

Skype for Business SQL Low RAM condition

skype-for-businessThere may be a situation when Skype for Business front end server despite of having enough memory performs very poorly and you can even see low memory errors in Event Log from SQL. In case the front end is hosted on virtual machine the first thing that has to be checked in such kind of scenario is MS SQL Server memory limits. These limits are set by Skype for Business Deployment Wizard at the moment of database installation and in case the virtual machine has dynamic RAM and amount of actual RAM was not maximum at the moment of deployment SQL Server memory limits could been set incorrectly. Continue reading

Skype for Business, Asterisk and SIP REFER

Skype-For-Business-Asterisk-SIP-ReferIf you don’t use VoIP gateway that “officially” supported by Microsoft and Skype for Business you may experience troubles in some cases as those devices may not interpret correctly SIP Refer messages sent by Skype for Business Mediation Server. The problem I’ve experienced in my environment was that when you activate “Call me at” feature in Skype for Business mobile client calls were immediately dropped after you had picked up your phone. I’ve used Asterisk as VoIP gateway and Skype for Business uses it for all calls to PSTN and cell carriers. Continue reading

Configure logrotate for Asterisk logfiles on CentOS

Asterisk PBXlogrotate is an utility specially designed for ease rotation of large numbers of log files. It allows automatic rotation, compression, removal, and mailing of log files. Each log file may be handled daily, weekly, monthly, or when it grows too large.

Normally, logrotate is run as a daily cron job. By default it lacks the configuration file for Asterisk logfiles. Here I’ll suggest an example but you may customize it based on your needs.

Continue reading

How to Disable Administrative Shares in Windows

Windows-disable-admin-sharesBy default, Windows creates some hidden shared folders – administrative shares. These folders are identified by a dollar sign ($) at the end of the share name and so they are hidden. Hidden shares are those that not listed when you look at the network shares on a computer in File Explorer’s Network node, or using the net view command. Windows 10, Windows 8, Windows 7 and even Vista and XP create hidden administrative shares that administrators, programs, and services can use to manage the computer environment on the network. Continue reading

Cannot publish topology changes. Conference directories still exist on a pool that would be deleted. Remove the conference directories before continuing.

skype-for-businessDuring migration to a new pool there was a need to remove old Front End servers from topology. After removing them from topology builder I received this error: “Cannot publish topology changes. Conference directories still exist on a pool that would be deleted. Remove the conference directories before continuing”. Quick look into the error showed that topology builder had a dependency on a conference service installed on one of the servers that wasn’t cleaned up properly. Continue reading

Load more