Legenda:
Negrito = Caminho do arquivo
Texto = Linha que deve ser localizada
Vermelho = Valor a ser editado, o padrão é 1024 , alterar para 10240
~/zdesktop/conf/attrs/zimbra-attrs.xml
<attr id="454" name="zimbraMailSignatureMaxLength" type="long" min="0" cardinality="single" optionalIn="account,cos" flags="accountInfo,accountInherited">
<defaultCOSValue>1024</defaultCOSValue>
/opt/zimbra/zdesktop/jetty/webapps/zimbra/js/NewWindow_2_all.js
name:"zimbraMailSignatureMaxLength",type:ZmSetting .T_COS,dataType:ZmSetting.D_INT,defaultValue:1024}
/opt/zimbra/zdesktop/jetty/webapps/zimbra/js/Startup1_2_all.js
name:"zimbraMailSignatureMaxLength",type:ZmSetting .T_COS,dataType:ZmSetting.D_INT,defaultValue:1024}
/opt/zimbra/zdesktop/jetty/webapps/zimbra/js/zimbraMail/prefs/Z mPreferencesApp.js
settings.registerSetting("SIGNATURE_MAX_LENGTH", {name:"zimbraMailSignatureMaxLength", type:ZmSetting.T_COS, dataType:ZmSetting.D_INT, defaultValue:1024});
Feita as alterações basta reiniciar o Zimbra Desktop
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