To access the System Administrator Mailbox:
1. Dial into voice mail: From any phone on system dial 150
2. When the system answers, dial [*] + [#] followed by the System Administrator Mailbox number: (# 0 0 )
The system will announce: “Mailbox 15-00”, which is the System Administrator Mailbox number.
3. When requested, enter the System Administrator password. Default = [9]+[#]+[56].

How to program greetings
1. Access the System Administrator Mailbox as described above. The System Administrator Mailbox Menu plays.
2. Press [1] to access system greetings. The system will prompt you for the greeting number
3. Enter the desired greeting number.
For example:
1 = Default Day greeting
2 = Default Night greeting
3 = Default Temporary greeting
4. You will be prompted with the following three choices:
Press [1] to Review.
Press [2] to Record. You will be prompted to record the greeting
When you finish recording, press [#] to save the recording.
You can then
Press [1] to Review.
Press [*] + [*] + [*] to exit the system completely

If neither of the solutions you rec'd worked, try this one, which I got from tech company which installed my stem.

1. Select voice mail from any extension (e.g., the "flex key which does directly to your mail box).

2. Enter your password

3. Enter 7

4. When asked for a passord, enter 2275

5. Select 1 (Record Prompts)

6. Select 1 (Edit Menu Prompts)

7. Enter the menu number for your outgoing greeting.
In my case, 100 was the daytime menu number;
120 was the nightime menu number.

After entering in the menu number, press #.

Your existing system-wide outgoing message will begin to play; here are the options:

1. Listen to message;
2. Record new message
You will be to begin recording after the tone and press any key (e.g. "#") when done.
3. Delete message
# Fnished (returns to prior menu).

Note: If you get a busy signal when you enter 100 or 120, it means that your greeting "menu" number was programmed with different numbers (e.g., the number you selected wasn't programmed). So, start over, and this time try 1; if that doesn't work, try 2; just keep going until you find out which one was used to record your daytime greeting. Hopefully, whoever programmed it had the brains to create a nightime and temporray systemic greetings usually some rational numbering system. Can't say that my tech company did. Hope this helps, good luck!

Dial into business from outside phone, press * and type in sytem administrator passcode
Listen to options to record greeting or record instruction, and complete task

I have a starplus sts model number 3516-71 and im farely new here at wrk and nobody here seems to know how to access and and retrieve messages

Try dialing 150, 0000.

Do you want to rerecord the auto attendant message? The message people hear when you don't answer the phone fast enough. There isn't much in this area I can't help you with.