We have 2 links that you can create with variables that allow you to link to Sync 365 from your PSA.
1. Link to the company in Sync 365
2. Trigger a contact sync for the company in Sync 365
Get your User ID:
For this you will need to know your UserID with Sync365. You can find this by logging in and going to Tools> Settings.
Your UserID will be displayed in the top right of this page.

Create an API key: Required for triggering contact sync
In Tools and Logs> Settings you will have a "Generate API Key" button.
Click on this to create a new API Key (you can have a max of 10).
Copy this Key as it will be used later and you will not be able to retrieve it again.
You will need admin permissions in Connectwise to set this up.
Now when you open a company in Connectwise, you will have these option in the Links menu

These links are called LiveLinks in Autotask. (Documentation available here:https://ww1.autotask.net/help/Content/4_Admin/3Automation/AutoformsLiveLinks/LiveLinks/CreateLiveLink.htm)
You will need admin permission to set these up. Autotask originally only gave the owner access to live links and the owner needs to provide access to other users to configure live links.
> Admin> Automation> AutoForms& LiveLinksFrom the main screen of the Autotask LiveLink Designer, click New to create a new LiveLink
LiveLink Name: Open in Sync 365
Label: Open the company in Sync 365
Active: Checked
Category: AccountingLiveLink Application Name: Leave blank
Entity: Organizations
Base URL: https://sync.s365l.com/user/openCompany
QueryString Values: ?user_id=<yourUserID>&id=<COMPANYID>
LiveLink Name: Sync Microsoft Contacts
Label: Sync the Microsoft contacts to Autotask
Active: Checked
Category: Tech tools
LiveLink Application Name: Leave blank
Entity: Organizations
Base URL: https://sync.s365l.com/user/contactSync
QueryString Values:https://sync.s365l.com/user/contactSync?user_id=<yourUserID&id=[companyrecordid]&apikey=<APIKey>
These live links will now be available on the organization screen