Samsung idcs 18d: delayed messages. periodically we will have voicemail messages delayed; won't show up for days or older messages will show up that we already had received.

SOURCE: samsung idcs 18d

got the scoop on how to change the date and time. first while handset is on hook press TRSF then dial 200 Dial 1234 the display shows enable cus prog dial 1 to enable then press TRSF To change the date and time from here out press TRSF and dial 505 the display will show : (this is an example)
old: 6010104:0047
new:WMMDDYY:HHMM
Enter the new time and date using the above format and the system will return to step 2. Verify the time and date and re enter if necessary Press TRSF to store and exit. or press SPK to store and advance to the next program.

SOURCE: recording main message

trying to recorded a different main message to phone, how do you do it?

SOURCE: iDCS 18D VM setup and template for lines

Here's a link to download the manual. Sorry, I couldn't find a template.
http://www.samsungidcsphonesystems.com/pdf%20files/user%20guides/iDCS_Keyset_User_Guide_10_2005.pdf

SOURCE: Samsung iDCS 18D

Dial transfer, dial 505.
You'll be promted to enter the new date and time.
Dial transfer to save and exit.

SOURCE: How do I program buttons

Hi I have posted a video off http://www.abbeytelecom.com showing how to do the soft key programming, a tip is when programming the transfer to voicemail - it shows as VT *** ( voicemail group number).