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change Invoice DUE to same Date to have 1 Invoice instead of ten.

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we have Customers with several recurring Products which was ordered each on other Days. 

is there a smooth Option or "How To" to set Invoices all to 1th of Month to have automatically WHMCS creates ONE Invoice instead of TEN Invoices each Month?

It must be easy without Fails. We can't change Dates and Calculate Manually the difference Amount of that. 

Hope you understand as i can't explain that good in english. 

Any Ideas? 

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This can be done using the "Bulk Actions" at the bottom of the client's Summary tab: https://docs.whmcs.com/Clients:Summary_Tab#Mass_Updating_Services.2FAddons.2FDomains

  • Tick all the services you wish to change, 
  • Scroll down to the Bulk Actions section
  • Click "Show Advanced Options"
  • Change the "Next Due Date" to the new date in the future you wish all these services to have
  • Tick the "Create Prorata Invoice" checkbox
  • Click Apply

WHMCS will generate an invoice for the difference between the current next due date and the new next due date for each service. Once paid, the Next Due Date on the services will be incremented forward to the date specified.


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Hi, are there some tipps to get this correct as possible? 

Backwards calculation is probably not working that good? 

We good messed up with this Function. 

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