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The app itself does not store any of your Confluence page content, it only stores page ids to identify pages to be synced.
How to use 5
Step 1: Configure
Click on the "configure" button at the Knowledge Sync: Confluence to Freshservice section of the "Manage Add-Ons" page.
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After you configured your Freshservice API credentials you can go to any confluence page and click on the button on the top right of your page to open a page options dialog. This dialog will let you select a destination to sync this Confluence page to. Select one and click "Start synchronization".