As a rule we don't keep a record of your passwords. If you've forgotten your password to your Microsoft account, you can reset this yourself. Follow the steps below,
1. Open a web browser and go to portal.office365.com
2. Enter your account name and choose Next
3. Choose Forgot Password
4. Confirm the name of the of your account and enter the text/number code you see on the screen. Choose Next
5. You'll then be asked to verify your identity using an SMS text message or phone call to your mobile phone number.
6. Enter the code sent to you via SMS or confirm via answering the phone call
7. You'll then be given the option to set your new password. Which can be used to sign-in to the Office 365 apps or your Mail app if your company uses Microsoft as it's mail server. If in doubt, just ask IT!