1) make outlook automatically store xls to folder

update reg key to enable "run script"

enable in trust center settings: APPLY MACRO SECURITY SETTINGS to INSTALLED ADD-INS

create the following vbs script:

```
Public Sub SaveAttachmentsToDisk(MItem As Outlook.MailItem)
	Dim oAttachment As Outlook.Attachment
	Dim sSaveFolder As String
	sSaveFolder = "Z:\Docs\RootShell\cal_xls\"
	For Each oAttachment In MItem.Attachments
		oAttachment.SaveAsFile sSaveFolder & Format(Now, "yyyymmdd") & ".xlsx"
	Next
End Sub
```

create rule:

subject contains "calendar" and has attachment
move to folder "calendars" and run above macro

2) store the files in this repo somewhere calendar can access.

update the config options in xls2ical.php

3) add url http://secretplace.com/xls2ical.php - boom calendar