Check AD property 'msRTCSIP-BaseSimpleUrl' of abcd@example.com on each domain controller.

One of the way how it can be done is by performing Lync cmdlet:

(Get-CsOnlineUser abcd@example.com -DomainController <DC>).BaseSimpleUrl

ex:
PS C:\Users> (Get-CsOnlineUser abcd@example.com -DomainController IHM-CAM-DC-1.example.com).BaseSimpleUrl
https://meet.lync.xyz.net/example.com/Meet

RUNLEVEL

1. How to check current runlevel on which you are logged in:

who -r

or

runlevel

2. Check services which are enabled in which runlevel:

chkconfig

3. What are the runlevels existing in a Linux system configuration and its meanings:

ID	Name	Description
0	Halt	Shuts down the system.
1	Single-user Mode	Mode for administrative tasks.[2][2]
2	Multi-user Mode	Does not configure network interfaces and does not export networks services.[3]
3	Multi-user Mode with Networking	Starts the system normally.[4]
4	Not used/User-definable	For special purposes.
5	Start the system normally with appropriate display manager. ( with GUI )	Same as runlevel 3 + display manager.
6	Reboot	Reboots the system.

Runlevels design changes and it depends on the Operating system that we are using like UBUNTU, REDHAT.

4. How to change the runlevel via command line without rebooting:

telenit <runlevel>

or

init <runlevel>

Run Multiple Instances Of Skype on Your Desktop.

1. Go to the skype installed program folder. You can get the details of the installed folder by Right clicking on Skype Icon on your desktop (Click Properties), then check the "Start In" section to get the installed folder details.
2. Then Go to the folder found in step 1.
3. Click on the skype.exe icon and create a shortcut to desktop.
4. In the desktop shortcut goto properties --> and in Target section update like as following:

"C:\Program Files\Skype\Phone\Skype.exe" /secondary

Note: Just Add "/secondary" to the existing Target section.