Is X-MS-Exchange-Organization-OriginalEnvelopeRecipients always QP encoded?

%3CLINGO-SUB%20id%3D%22lingo-sub-2834400%22%20slang%3D%22en-US%22%3EIs%20X-MS-Exchange-Organization-OriginalEnvelopeRecipients%20always%20QP%20encoded%3F%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2834400%22%20slang%3D%22en-US%22%3E%3CP%3EPlease%20can%20someone%20help%20me%20with%20my%20query%3F%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%20Is%20there%20any%20Exchange%20server%20that%20would%20encode%20(QP)%20email%20addresses%20in%20the%3CSTRONG%3E%26nbsp%3BX-MS-Exchange-Organization-OriginalEnvelopeRecipients%26nbsp%3B%3C%2FSTRONG%3E%20header%20by%20default%20as%20shown%20below%3F%20What%20criteria%20is%20used%20to%20determine%20when%20to%20encode%20address%20fields%20in%20the%20Envelope%20Recipients%20header%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CPRE%20class%3D%22lia-code-sample%20language-markup%22%3E%3CCODE%3EX-MS-Exchange-Organization-Processed-By-Journaling%3A%20Journal%20Agent%0AX-CrossPremisesHeadersPromoted%3A%20prod.protection.outlook.com%0AX-MS-Exchange-Organization-Cross-Premises-Headers-Promoted%3A%20prod.protection.outlook.com%0AX-CrossPremisesHeadersFiltered%3A%20prod.protection.outlook.com%0AX-MS-Exchange-Organization-Cross-Premises-Headers-Processed%3A%20prod.protection.outlook.com%0AX-MS-Exchange-Organization-Originating-Country%3A%20US%0AX-MS-Exchange-Organization-P2SenderPII%3A%20%0AX-MS-Exchange-Organization-P2SenderDisplayNamePII%3A%20%0AX-MS-Exchange-Organization-OriginalEnvelopeRecipients%3A%20%3D%3Fus-ascii%3FQ%3F751%40mycompany.mail.onmicrosoft.com%3B331%40mycompany%3F%3C%2FCODE%3E%3C%2FPRE%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2834400%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOutlook%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Occasional Visitor

Please can someone help me with my query? 

  Is there any Exchange server that would encode (QP) email addresses in the X-MS-Exchange-Organization-OriginalEnvelopeRecipients  header by default as shown below? What criteria is used to determine when to encode address fields in the Envelope Recipients header?

 

 

X-MS-Exchange-Organization-Processed-By-Journaling: Journal Agent
X-CrossPremisesHeadersPromoted: prod.protection.outlook.com
X-MS-Exchange-Organization-Cross-Premises-Headers-Promoted: prod.protection.outlook.com
X-CrossPremisesHeadersFiltered: prod.protection.outlook.com
X-MS-Exchange-Organization-Cross-Premises-Headers-Processed: prod.protection.outlook.com
X-MS-Exchange-Organization-Originating-Country: US
X-MS-Exchange-Organization-P2SenderPII: 
X-MS-Exchange-Organization-P2SenderDisplayNamePII: 
X-MS-Exchange-Organization-OriginalEnvelopeRecipients: =?us-ascii?Q?751@mycompany.mail.onmicrosoft.com;331@mycompany?

 

 

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