Visit the PLANOLY Profile Page, and scroll down to the MANAGED ACCOUNTS section. 

1 | Instagram Auto-Post
Log into a Facebook Profile that is the owner of the Facebook Business Page, or one that has an administrator role
* Do not uncheck any permissions, as this will disable specific features enabled for the linked PLANOLY account.

2 | Facebook Auto-Post
Only available for paid plans
Enable auto-post to directly publish the Instagram post to the linked Facebook Business Page

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Confirm Auto-Post is enabled when content is scheduled and the Auto Post toggle is enabled.
Auto Post | Guidelines and Limitations