Server Password

Boot off a boot cd,  Unless the system is encrypted.  Then no.  You probably want something else but you need to be more specific.

Access it meaning Login? Or accessing file shares? If you do have permissions to the server on some directory or share you can try to UNC "\\servername\sharename\" without using a password. However if you want to login then you will require permissions to login to the server using your own credentials.

Will.

no-one does not know the domain password or local password to get into the server... - I mean in login into the server

My article will help you to reset the local admin password if you have windows media/DVD.
Article is for 2008/7 but the same can be used for 2012 by renaming sethc.exe

mas - further to this i get to - X:\Sources
when trying to go to : c: get error "the system cannot find the drive specified"  - the OS is definatly on the C drive

If you had explained what was going on I would have been able to post a link to this sooner to a video demonstrating in 5 minutes how to use utilman and any Windows Vista or later DVD (including server) can be used to regain access very quickly.

In the future, consider posting details in your question and explain the context.  Faster, more accurate answers will then be presented.

please see attached screen shot
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I've asked to reopen

Seems like your OS is not installed in C or D.
Please try to find the "Windows" folder to change password.

More likely, the drivers necessary for your RAID controller are not loaded so the boot CD/DVD cannot see the hard drive to use the utilman (or similar trick).  You have to load the drivers for the RAID controller.

Agree with Lee

Guys - this is a test environment and no RAID has be configured  - 100% the OS has been installed on the C drive.... the CD used was a standard iso image..

Type  below commands and check your HDD/partitions are listed
DISKPART
LIST Disk
LIST Volume

If you cannot see your disk/partition your HDD needs driver to get detected.

Mas Thanks  - i will try this tomorrow  as im out the office today. will get back to you guys then

Is there any chance you will provide more detail so we can help you more effectively?  Like what kind of server this is?  This is the first I'm hearing it's a test environment - it's getting very frustrating for me advising you based on professional standards only to find out you may not be following them.

This is Server 2012 - the assumption is that it's installed on a Server class system if it's not a VM.

Either way, if your not seeing your C: drive it's either bitlockered in which case there is NO WAY to recover it, or you don't have the proper disk controller driver - which is VERY VERY commonly a RAID controller but COULD be another type of controller.

Even me too I am not 100% clear on your query.
Please give more details to provide you a better and easy solution.

Guys  - Sorry for the confusion - please see screen shot... Basically this server had no Raid configuration.. and when trying out MAS original solution i could not see the C drive listed... so i did a : DISKPART / LIST Disk & LIST Volume   - i could see the volume but no letter assigned - so then i did a "Select Volume 1" - "assign letter=C" .  Then when doing a List Volume i can see the C drive now - for some reason the letter was not assigned to the volume...

Basically i tested this above on my test environment before doing this in production... and have applied the fix that MAS first suggested has has worked... sorry for the confusion guys...
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Glad to know it is fixed