Hi,
We have a problem where users name becomes corrupt in the track Changes functionality (see screen shot below). This issue can occur from one day to another and older changes done by the same user still display correct name in track changes. The user have
not been changing settings for "Change User Name" and "Always use these values regardless of sign in to Office" in track Changes settings.

Extracting the docx and looking into the xml files we see the corrupt username in several files:
people.xml:
<w15:person w15:author="@@Bd9zbt6IE5V9XyNHEDxcPzW32jmA"><w15:presenceInfo w15:providerId="None" w15:userId="@@Bd9zbt6IE5V9XyNHEDxcPzW32jmA"/></w15:person>
comments.xml:
<w:comment w:id="148" w:author="@@Bd9zbt6IE5V9XyNHEDxcPzW32jmA" w:date="2019-01-18T15:25:00Z" w:initials="TS"><w:p w14:paraId="17AE6136" w14:textId="584F8A3E" w:rsidR="009575CE" w:rsidRPr="009575CE" w:rsidRDefault="009575CE"><w:pPr><w:pStyle w:val="Kommentarer"/><w:rPr><w:lang
w:val="sv-SE"/></w:rPr></w:pPr><w:r><w:rPr><w:rStyle w:val="Kommentarsreferens"/></w:rPr><w:annotationRef/></w:r><w:r w:rsidRPr="009575CE"><w:rPr><w:lang w:val="sv-SE"/></w:rPr><w:t>TS: Se rut som en mening s</w:t></w:r><w:r><w:rPr><w:lang w:val="sv-SE"/></w:rPr><w:t>om
till hälften blivit raderad.</w:t></w:r></w:p></w:comment>
document.xml:
<w:ins w:id="144" w:author="@@Bd9zbt6IE5V9XyNHEDxcPzW32jmA" w:date="2019-01-18T15:28:00Z"><w:r><w:rPr><w:noProof/><w:lang w:val="sv-SE"/></w:rPr><w:t xml:space="preserve">Ett exempel på en lista </w:t></w:r></w:ins><w:ins w:id="145" w:author="@@Bd9zbt6IE5V9XyNHEDxcPzW32jmA"
w:date="2019-01-18T15:29:00Z"><w:r><w:rPr><w:noProof/><w:lang w:val="sv-SE"/></w:rPr><w:t>–</w:t></w:r></w:ins>