Issue:

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When we try to click on Reply or Reply All or Forward on Cases created by Email getting error Access is Denied

Impact:

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Unable to click on Reply or Reply All or Forward on Cases created by Email. Require to Click on Save in order to use this functionality.

Repro Steps:
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 1. CRM > Sales > Contacts > +NEW: > Save and Close
 First Name: Test
 Last Name: Contact
 Email: test@test.com
 2. Sales > Accounts > +NEW: > Save and Close
 Account Name: Test Account
 3. Menu > Settings > Templates > Email Templates > New
 Template Type: Case
 Title: Test Template
 Click in the Subject line > Insert/Update > Add > Record Type: Case; Field: Case Title > Ok > Ok
 Click in the Body > Insert/Update > Add > Record Type: Case; Field: Case Title > Ok > Ok
In the body put a space after the title then >> Insert/Update > Add > Record Type: Case; Field: Customer > Ok > Ok
 4. Save and Close
 5. Menu > Service > Cases > New Case: > Save
 Case Title: Test Case
 Customer: Test Account
 6. In the activity pane click on "..." > Email
 7. When we try to Reply or Reply All or Forward the Case

Actual Result:
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A message appears: Changes have not been saved...
Click on Cancel and an Access is Denied message appears.

We need to click on Save in order to proceed further

Expected Result:
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We should be able to click on Reply or Reply All or Forward on Cases created by Email without requirement of clicking on the Save Button for all case records.