Go to this link: https://help.salesforce.com/s/articleView?id=000380206&type=1

Click on the "Account Engagement AppExchange package" link.

Choose the "Production Environments" option.

Log in with your Salesforce credentials → Select "Install for Admins Only" → Click the "Install" button.

On the confirmation screen, select the same checkboxes as shown in the reference screenshot → Click "Continue".

After the installation is successful, go to Setup → Use Quick Find to search for "Business Unit Setup" → Follow the on-screen instructions and assign the user as Admin → Click "Save".

Go to Setup → Use Quick Find to search for "Setup Assistant" → Scroll to the "Beyond Basics" section → Enable the "Account Engagement Lightning App".

Once enabled, the "Account Engagement" app will appear in your App Launcher.

Open the App Launcher → Navigate to the "Account Engagement" app.

Inside the Account Engagement app, go to "Account Engagement Settings" → Under "User Management", Click "Users" → Click the "Add User" button.

Create a new user inside the Account Engagement platform, using the same details as the corresponding Salesforce user.

Return to Setup → Use Quick Find to search for "Users" → Select the Salesforce user you created in Account Engagement.

Assign the "Account Engagement User" permission set to this user.

Go to Setup → Use Quick Find to search for "App Manager".

In the App Manager, find the "b2bma_canvas" app → Click the dropdown arrow next to it → Select "Manage".

Scroll down to the "Profiles" section → Click "Manage Profiles" → Add the profile of the user to whom you want to grant access to Account Engagement.

To add the Salesforce Connector, go to the Account Engagement app → Click on the "Account Engagement Settings" tab → Click on "Connectors".

You'll see the Salesforce Connector status is Paused.

Click on Actions → Select "Resume Sync".

The Salesforce Connector status will change to Verified.