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I managed to create a Rest Apex Class that sends an emailmessage, attached to a given case. But unfortunately, the sent email lacks  the tag ref:_00D3X2nqVQ._5003X1tjFN0:ref

I guess that's because I need to set a Thread Id, but I don't know how to do it 

Manually created / sent eMailMessge do get the ref:_00D3X2nqVQ._5003X1tjFN0:ref appended to the body

glitchtracker
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1 Answers1

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You can create a formula field for Case thread Id with formula as below:

"ref:_" &
LEFT( $Organization.Id , 5) &
IF (MID ( $Organization.Id, 6, 1) <> "0", RIGHT($Organization.Id,10),
IF (MID ( $Organization.Id, 7, 1) <> "0",RIGHT($Organization.Id, 9),
IF (MID ( $Organization.Id, 8, 1) <>"0", RIGHT($Organization.Id, 8),
IF (MID ( $Organization.Id, 9, 1)<> "0", RIGHT($Organization.Id, 7),
IF (MID ( $Organization.Id,10, 1) <> "0", RIGHT($Organization.Id, 6),
IF (MID ($Organization.Id, 11, 1) <> "0", RIGHT($Organization.Id, 5),
IF(MID ( $Organization.Id, 12, 1) <> "0", RIGHT($Organization.Id,4),
IF (MID ( $Organization.Id, 13, 1) <> "0",RIGHT($Organization.Id, 3),
IF (MID ( $Organization.Id, 14, 1) <>"0", RIGHT($Organization.Id, 2), "") ) ) ) ) ) ) ) )
& "._" &LEFT( Id, 5) &
IF(MID ( Id, 6, 1) <> "0", RIGHT(Id, 10),
IF (MID ( Id, 7, 1)<> "0", RIGHT(Id, 9),
IF (MID ( Id, 8, 1) <> "0", RIGHT(Id,8),
IF (MID ( Id, 9, 1) <> "0", RIGHT(Id, 7),
IF (MID ( Id, 10,1) <> "0", RIGHT(Id, 6),
IF (MID ( Id, 11, 1) <> "0",RIGHT(Id, 5),
IF (MID ( Id, 12, 1) <> "0", RIGHT(Id, 4),
IF (MID( Id, 13, 1) <> "0", RIGHT(Id, 3),
IF (MID ( Id, 14, 1) <>"0", RIGHT(Id, 2), "") ) ) ) ) ) ) ) ) & ":ref"

Then append this formula field in the subject line or email body in your apex class if you are generating them in the class. If you are using an email template, you can append the field directly in the email template using merged fields.

Hope this helps.

mediocreCoder
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