set PR_SECURITY_FLAGS MAPI properties in outlook add-in (New Web Add-In, Office JS + Manifest)
Set emails PRSECURITYFLAGS (http://schemas.microsoft.com/mapi/proptag/0x6E010003) property with any of the below values.
NONE | 0x0000 | Message has no security ENCRYPTED | 0x0001 | Message is encrypted SIGNED | 0x0002 | Message is signed SIGNED | ENCRYPTED | 0x0003 | Message is signed and encrypted
Used Custom properties , but didnt work out.
I am working on Outlook latest web add-in (Office.Js + Manifest)
Is this is possible with Office.JS Or Graph API or EWS
Please help me here