How can I change the time on my Mitel 5220 IP phone? What is the website that I need? I think it's a Mitel website?

The time is set within the phone system, not on the telephone. Contact your vendor for this change.

Log into your mailbox. Press U for user options, and G for greeting... follow the prompts for changing it.

Contact your system administrator or system vendor and have the time on the phone system adjusted. Time is a system wide setting. The newest version of the 3300ICP/MCD allows the time to automatically adjust - you should get the system upgraded.

Dial 58#. Listen for quick beep. Press key between 2-9.

Make sure that it is a Dual Mode 5220. If it is you can use it as a SIP extension. It wiill say it on the back of the Mitel phone next to the 5220.
If it is a dual mode phone you can purchase a sip trunk from a provider and then would be able to use the phone.
When you boot up the phone hold the blue super key while the phone boots, hit the no softkey till you get to phone mode. Hit yes it will allow you to change the phone from minet to sip. This should get you started in the right direction.

you need to log into the management console of the mitel 3300 if this is the system that you have and then click on the "group administration tool" option, you may or may not have access to this depending on your security setup on the system. Then it is self explanitory you see the change time option. All sets will update in seconds.

main system greetings can be changed via the administrator mailbox, dial your voicemail huntgroup number, on answer press the * key and supply the admin mailbox number which is usually 999 or 9999 the default pincode is 8642 then follow the voice prompts to change the system greeting.

You'll need to log into the voicemail server or PBX that hosts the VM and reset the passcode for each mailbox you're trying to access. If you have an embedded Mitel VM you can change the passcode by logging into the Admin mailbox then select option 2 to edit mailboxes, pick the mailbox to edit and follow the prompts until you have the option to change passcode

What Mitel phone system do you have. 3300ICP you can change it in programming same with a 200ICP.

To Restore Factory Default Settings:
1. Press both Up and Down Arrow keys simultaneously while powering up the
phone. NETWORK SETTINGS? appears
2. Press NO until TOOLS & FEATURES appears and then press YES.
3. Press NO until RESTORE DEFAULTS? appears and then press YES.
4. Press CONFIRM. The phone resets with default settings.