Installing Xero from App Store doesn't mean already connecting with your Xero account. This is only the first step.
The following 3 steps need to be done in order to connect Xero with Cin7.
1. Adding Xero Module to your account.
2. Connecting Cin7 to Xero.
3. Configuring the integration.
Please refer to the help article Connecting Cin7 to Xero for further information.
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